Halo 4 BR85HB SR (Pic heavy!) - First Major Project

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Hardware arrived for secret commercial project, so things have slowed down a little here. Plus, since pretty much all that's left is finishing work, which is just filling-sanding-spraying ad nauseam, there isn't a whole lot to show that doesn't all look the same. Still, there are a few bits and pieces to show.

Made a 7/16" dowel paint stand for the barrel and realised I could drill a 1/4" hole in it for constructing and painting the charging lever:

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This side is pretty much done now, I think it was about 3.5 hours. I'm planning on recording the second side.

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Got the Arduino Pro Mini running using an FTDI bridge for LCD screens, just gotta jump the green/RTS pin because Arduinos use a 6-pin RS232 protocol rather than 4D Systems' 5-pin setup.

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Finishing progress is fun to record. This is the top of the rear bumper, Bondo scraped and wet sanded to 400 grit:

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From there, the aim is this, the bottom of the magazine, clearcoated over wetsanded 2000 grit:

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I'm gradually converting our coal room into a paint room. It's also my winter gym because the garage is too cold, so it's a little awkward until I get it figured out.

But generally, it's coming along nicely. I was hoping to be done by the end of February but USPS ended up being more efficient package deliverers than expected, so it'll probably run into the middle of March or so. I'm still generally on schedule though, so I'm not too concerned.
 
A little more progress here as I've taken breaks here and there over the last week from the commission project. Mostly just filling and finishing work, but I finally pushed through and stopped putting off fixing up the gaps in the stock-chamber-grip mating lines. It's a Bondo-squish-based extension, so there's not really anything fun or therapeutic about it. Nevertheless, it's a good 50% done now, looks pretty good from the outside. This was the main hurdle to completion, I would say, about on par with filling in all the gaps in the trigger section for easy moulding. The rest is just your average finishing work (which I'm also doing a video on, in case anyone was interested in the MDF-to-mirror workflow).

Speaking of content, I wrote up my basic Bondo workflow with illustrations, if anyone's wondering about that. Nothing new if you're used to working with it, but if you're wondering what it's like, it might help you prepare: http://robtaylorcase.com/blog/?p=399 - Just skip past the first couple images, since that section's just referencing this thread.

So, giant-ass gap:

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Masking off and locking together the chamber and grip:

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After letting both sides cure and removing the other parts. Needs some work, but looks like it's done the bulk of the job:

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A much smaller gap, which is actually closable by force. Once it's cast and glued tightly, it'll be barely noticable. It may even disappear as part of the painting process:

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There's some repair to do from trimming, some remainder-filling, and some bevel-filing, but it's taking shape nicely. And yeah, the grip has had its first round of dark primer, so that whole first section (in the sponge, a couple of posts up) is almost done and ready to mould.
 
Nice job with that. I tried to do the same sort of job on a League of Legends prop using Press and Seal instead of Saran Wrap. No good. The Press and Seal reacted to the Bondo and swelled leaving a new wavy gap. Your Bondo tut is great too--covers all the basics very clearly.

Redshirt
 
Thanks guys!
Redshirt Cool, that's two thumbs up from experienced builders now. I kinda had to just figure it out as I went, I haven't seen any kind of Bondo overview anywhere with any proper detail.

Huh. That stuff looks like it would be handy to use, so that's good to know.
 
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Making good progress, just got the last couple sequences to do on the finishing process video in the morning. Meanwhile, in the last couple days...

Filled in the inner areas of the mating surfaces and smoothed it out:

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Removed the lower Bondo squish part and chopped off the dowels because I didn't like the way they fit any more:

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Reworked the top and rear of the grip to fit to the other two parts. I'm planning on this "useless" area for the pour spout on this piece too:

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There are issues with working with mat board when it comes to wet sanding (vs, say, styrene):

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Dinged an overapplication of filler primer, but after wet sanding I liked the way it looked, so it's staying:

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Grip needs a second coat of clear, but other than that... The metallics should look really good on this thing:

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The functional appendages aren't being ignored!

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While shooting the video (I'm doing start to finish on the "rear" of the stock... The inside, if you're right handed):

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Played with the parts, loved the texture/specularity differences. The parts are going to need trimming/sanding down where they mate, since they generally fitted together almost perfectly prior to all the coats of primer and clear acrylic:

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Fun!

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Moar fun! The block on the rear of the trigger can be trimmed to size and drilled accordingly depending on the builder's choice of switch (or glued static, whatever).

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Pleased with the progress over the weekend!
 
You sir, are putting a lot of time into a gun. This gun will be legendary when its finished. I hope you plane on turning that into a cast. great work.
 
You sir, are putting a lot of time into a gun. This gun will be legendary when its finished. I hope you plane on turning that into a cast. great work.

Thanks man! I'm more interested in weapons and props than armor, so I'm ok with the time. I'm gonna do something that isn't Halo nor a gun next though, hahah!

Yep, all this finishing work is for molding and casting, or I wouldn't have gone to quite this much trouble! I'm planning on doing a short run of kits at $230+shipping for cost recovery, hopefully there's a market for Halo 4 BRs!

---

I finished the video on my finishing process, I was aiming for 18 minutes but it turned out to be 30 minutes long. I think I managed to keep the fluff and repetition to a minimum though, it's just a pretty time-consuming process:


...And the result, up to date pics:

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...Delicious. :D
 
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I'm planning on doing a short run of kits at $230+shipping for cost recovery, hopefully there's a market for Halo 4 BRs!
...Delicious. :D

Only thing that would be better is if it was a working gun, but I guess that would make it not be allowed at cons. Sort of a dream goal of mine to have enough money to commission a gunsmith to make a fully functional BR.
 
er my god. I think my mind just melted. That is a hot battle rifle Rob. Like dang man!
 
Only thing that would be better is if it was a working gun, but I guess that would make it not be allowed at cons. Sort of a dream goal of mine to have enough money to commission a gunsmith to make a fully functional BR.

This should have enough spare room in the rotocast parts to be converted to airsoft, at least! :p I'd love to build a fully-functional one, I believe once I have my citizenship I'm federally allowed to, though I don't know the relevant state laws on that. That'd be the ultimate test of machine skills once I have all of those tools! DIY is too ingrained in me to want to commission a gun smith- I'd have to be one myself if I wanted to sell one though.

er my god. I think my mind just melted. That is a hot battle rifle Rob. Like dang man!

Yeah, it's definitely shaping up nicely, that's for sure. With the imperfections depicted over the last few updates I still think it's just a B+/A- build, but I'm still pretty happy with it! Considering that 5 months ago I basically sat down one day and decided I'd build a battle rifle with no significant history of propmaking, I can't complain.

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Since I noticed it was sitting next to the pool table, here's a couple DSLR shots for a mini-HQ-update. I can't put it all together properly now that it's clear coated (the kit should superglue together perfectly after some sanding), but it's reasonably close:

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I have to work on the commission for the next couple days or so, but I should be able to get back to this by the weekend.
 
This should have enough spare room in the rotocast parts to be converted to airsoft, at least! :p I'd love to build a fully-functional one, I believe once I have my citizenship I'm federally allowed to, though I don't know the relevant state laws on that. That'd be the ultimate test of machine skills once I have all of those tools! DIY is too ingrained in me to want to commission a gun smith- I'd have to be one myself if I wanted to sell one though.

Yea, I have that same hacker/maker mentality, but I at the same time do not want to have to invest the several years to be good at such as this when it is much easier to just hire someone to do it. Plus, more often than not, people will offer discounts if it can be shown to them that several can be sold.
 
Yea, I have that same hacker/maker mentality, but I at the same time do not want to have to invest the several years to be good at such as this when it is much easier to just hire someone to do it. Plus, more often than not, people will offer discounts if it can be shown to them that several can be sold.

Yeah, there is that. When it comes to super specialised experience it's tricky, though my ego tells me that I can accomplish anything I throw myself at with good results due to the variety of observational, analytic and reasoning skills I've built over the years. I'm sure that must have limits, though, I just haven't found them yet, and gunsmithing could be one of them. It would probably go more like I buy the barrel and then mill the other stuff myself, or something like that. That said, I'd probably consider that cheating and would rather have it as a 30-year backburner project than not scratchbuild it, lol. I'm not good when it comes to compromising (as this BR85 project is demonstrating)!

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Waiting on come components for the commission, so I can cram in a few days of hardcore BR85 finishing. I've fixed up the barrel, the trigger's ready to clearcoat, and everything else is flying along too. I'm working probably 10 hours a day in 2.5 hour bursts, because I can smell the finish line. :D

Magnets are back! This hole only needed one round of filling, so that was nice. Gotta figure out where the other holes are going to go, what's going to be removable, all that jazz.

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Lots of simultaneous work going on; filling, wet sanding, and painting on various parts while various other parts are drying from each thing.

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Tested the possibility of hand-carving machine-stamped alphanumerics last night with a Dremel 108 bit. It went reasonably well, as it happens. Need more practice though, and better lighting so I can see the tip of the bit:

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Cut the barrel plug like the barrel jacket plugs, but it just so happened that the opening on the PVC was (I guess) about 19.5mm. A little filing after this and it slotted right in the end:

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Stock lid and bumper. Boom. Ready for clear coat:

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Barrel. Boom. Complete and ready to mould:

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Trigger. Boom. Ready for clear coat:

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...The more I complete, the more it's accelerating, which is awesome. I'm leaving the barrel jacket and carry rail for last because I did the most finishing work on them during actual construction last year, so there shouldn't really be much to do on those at all.... Fingers crossed. The trigger guard and chamber are tricksy, as expected, but I'm wearing them down. Probably ten hours on each one but I'm getting happier after each stint, it'll be dark primer time for those within a few days. Tomorrow I'm going to spend some time coaxing the stock into completion, because it needs a piece adding to the back for the second bumper magnet and a piece of the mag well fixing so that it's flat and the silicone won't get stuck.

All in all, going nicely!
 
That looks about six different kinds of insane mate! Cannot even imagine the amount of hours that would be poured into a project like that, or how satisfying it must have been to put the finishing touches on the work. Shame I live on a different continent, I'll never get too see it in the flesh! Plenty of inspiration though.
 
Holy ****ity ****ing ****, Rob. I disappear for a while to focus on the burden that is my schooling, and you go and prove yourself the Aetherial Grand Master of all Forms and Functions of Propbuilding. I'm rather at a loss for words.

First of all, bollocks that thing is massive. Like, I knew the BR-series were large rifles firing large bullets carried by large men, but that's still pretty insane to me. Maybe I'd have to see it in real life, or maybe I'm just not used enough to holding actual firearms, because it almost seems unwieldy. The internal mechanics of a lot of the UNSC rifles always confused me (that makes sense, these guys are artists, not engineers). I haven't bothered to look where exactly the bolt and the ejection port are, but the travel distance seems pretty crazy (I thought, for some reason, that the BR's Mammoth rounds were caseless, but that's unique to the M7). Assuming the stock is as short as I think it is, it feels like the entire bolt carriage doesn't have enough room to actuate, but that might not be the case.

Your attention to detail is amazing. I'm certain I would have given up on that degree of detail. I'm certain I wouldn't have the wherewithal to maintain this project. And I'm exceptionally certain I couldn't have done this as quickly as you have. But if I'm not mistaken, you've made this your profession? And I'm a full time student. Just the process of sanding and polishing and sanding and polishing ad nauseum sounds like something that would deter me. The sheer amount of things you've had to freeform and freehand is crazy to me - the fact that it's a number of individual, custom interlocking parts, and is probably about half bondo, makes it seem to me like your brain is capable of operating in four dimensions and you fabricated this thing from thin air. Verily you are the master when it comes to shaping wood.

As an engineer (technical disclaimer: engineering student, but I maintain it's a way of life) my favourite parts are, of course, the one that make it light up and move, and I can't wait until you get into that part proper. Having the bolt assembly move back and forth in under a second is going to be a fun and interesting proposition. I wonder if you could put any mass on that and give the rifle some actual recoil. I also don't actually understand how you're making the ammunition display, given that you can't get any sort of LCD display in there.

Anyway, I know I disappeared for a while, and I knew yours is the sort of reason that I'd have to come back. That, and I recently cleaned off my workbench again and I have a bunch of things I bought and started working on staring at me with shame. It would appear my tools are guilt tripping me.
 
That looks about six different kinds of insane mate! Cannot even imagine the amount of hours that would be poured into a project like that, or how satisfying it must have been to put the finishing touches on the work. Shame I live on a different continent, I'll never get too see it in the flesh! Plenty of inspiration though.

Thanks man! Oh, I don't even know at this point. It must be in the four figures by now, I'm sure. It's super satisfying so put the last coat of clear on something and know I don't have to come back to it ever again, for sure. Ha, yeah, I'll never be approaching Aussie customs with anything approaching the appearance of a firearm, that's for sure!

You have the word "master" written all over you.

Oh, far from it, though I'm on my way. I'm only a fifth or a tenth of the way through my ten thousand hours! There are many improvements that could be made, shortcuts that could have been taken... It's certainly been a learning experience though. Nothing like taking on a ludicrously ambitious project with little experience to go on to push you way out of your comfort zone.

Holy ****ity ****ing ****, Rob. I disappear for a while to focus on the burden that is my schooling, and you go and prove yourself the Aetherial Grand Master of all Forms and Functions of Propbuilding.

Lololol. Funny you should show up today, I was just thinking about you and m00sem4n this morning.

I'm rather at a loss for words.

Followed by four paragraphs of text. A man after my own heart.

First of all, bollocks that thing is massive. Like, I knew the BR-series were large rifles firing large bullets carried by large men, but that's still pretty insane to me. Maybe I'd have to see it in real life, or maybe I'm just not used enough to holding actual firearms, because it almost seems unwieldy. The internal mechanics of a lot of the UNSC rifles always confused me (that makes sense, these guys are artists, not engineers). I haven't bothered to look where exactly the bolt and the ejection port are, but the travel distance seems pretty crazy (I thought, for some reason, that the BR's Mammoth rounds were caseless, but that's unique to the M7). Assuming the stock is as short as I think it is, it feels like the entire bolt carriage doesn't have enough room to actuate, but that might not be the case.

Yeah, it's insanely huge. Within a few mm of a G36 or M16 though, so it has plenty of precedent. And yeah, don't even bother trying to make sense of the mechanics of this thing, there's absolutely no sense to be made. It's completely impossible to operate with its given dimensions. Maybe if it was converted to 5.56, the barrel moved up and the receiver shortened.

Your attention to detail is amazing. I'm certain I would have given up on that degree of detail. I'm certain I wouldn't have the wherewithal to maintain this project. And I'm exceptionally certain I couldn't have done this as quickly as you have. But if I'm not mistaken, you've made this your profession? And I'm a full time student. Just the process of sanding and polishing and sanding and polishing ad nauseum sounds like something that would deter me. The sheer amount of things you've had to freeform and freehand is crazy to me - the fact that it's a number of individual, custom interlocking parts, and is probably about half bondo, makes it seem to me like your brain is capable of operating in four dimensions and you fabricated this thing from thin air. Verily you are the master when it comes to shaping wood.

Thanks! Yeah, it's been quite a task. Herculean though, not Sisyphean, fortunately. :p I've made it my profession inasmuch as I've dedicated the vast majority of my working hours to it over the last few months, and I'm really hoping that people like it enough to fund another project or two! Hopefully it takes off, we'll have to see. But it'll never amount to anything if I don't go for it.

Yeah, the interminable wet sanding is incredibly tedious, though the result is probably worth it. When it's done, it gleams. Well, I dunno about free-forming, necessarily, I mean, I'm working from design drawings that I'm transcribing from measurements of the 3D model. The compound curves are freehanded though, yeah. Unless you mean that it's all done by hand and not CNC'd, in which case, yeah, not yet, sadly.

Well, you know, in England when we graduate with Physics degrees we get given access to an extra couple of dimensions to work with. :p I think part of it is that I've done both standard woodwork, back in high school, and also green woodwork, where you have to be able to visualise the final product before touching the wood, and then all you have to work with is an axe and a knife or two. The Bondo thing turned out pretty well considering I've never really been much of one for clay or sculpting, and yeah, I dunno. I'm a designer and photographer too, so combined with the science background and the manual ability, it's like an extreme attention to detail with an artistic bent. I dunno how to describe it, really. It's something I've been honing semi-deliberately for decades though.

As an engineer (technical disclaimer: engineering student, but I maintain it's a way of life) my favourite parts are, of course, the one that make it light up and move, and I can't wait until you get into that part proper. Having the bolt assembly move back and forth in under a second is going to be a fun and interesting proposition. I wonder if you could put any mass on that and give the rifle some actual recoil. I also don't actually understand how you're making the ammunition display, given that you can't get any sort of LCD display in there.

No, you're exactly right, it is a way of life. I think of myself as an engineer, not a physicist- I like applying science to problems. I'm prone to overthinking, though, so sometimes it's nice when a real engineer comes in and suggests a far simpler approach or an alternate angle of looking at something.

The bolt should be a challenge, though I'm now considering that a brushless motor (precise speed control) combined with some timing belt and some other bits and pieces might be the way to go. A bit like the previous suggestions of an airsoft gearbox, but I can make it smaller, more powerful, and custom shaped for installation. Assuming that a brushless motor can accelerate fast enough, of course. That's my issue there, I don't want to have to keep it constantly spun up like an airsoft AEG. I doubt any mass could be part of that system, since keeping it as light as humanly possible is a requirement for the speed of operation, but it might be doable somehow. It's not something I'm looking at, since I think I've already bitten off quite enough to be chewing on for now, but I'd be interested to see someone tackle it.

Current plan for the ammo counter, assuming I can't cheat and just use an OLED for half of the display, is to build a laser projector that fits inside. Getting the right lenses in low order quantities seems to be the tricky part. It would be nice if I can convince Smooth-On to send me some Crystal Clear, since it's apparently not available to residential customers (Pretty sure Kamui's shipped it to a German residence though, so...)

Anyway, I know I disappeared for a while, and I knew yours is the sort of reason that I'd have to come back. That, and I recently cleaned off my workbench again and I have a bunch of things I bought and started working on staring at me with shame. It would appear my tools are guilt tripping me.

Ha, cool. Speaking of reasons to come back, LilTyrant just started a new build, which I assume will be magnificent and inspirational, and Black Underdog5's doing some pretty impressive stuff too. Ah, empty workbench guilt, I know it well. Well, not that well, since I'm terrible at tidying up. But occasionally!

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PIC DUMP

Clear coat pooled on the barrel while I was spraying the inside, so it had to be trimmed off, feathered and smoothed out again, and re-sprayed.

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Was getting sick of the stock and its weirdness, so some drastic action was taken. Cut out the mag well (which I didn't actually need to do, in retrospect, but I didn't have an exact plan at the time):

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Filled the end:

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Filled the outside:

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And accidentally chewed up my completed side with the Dremel router bit, since it's impossible to use those things without damaging or destroying something. To be fair, they're not intended to be freehanded:

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Chopped off the now-surplus-to-requirements rail plug, since it would add unnecessary complexity to the moulding process.

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More little pieces are done:

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Got bored of filling and started using superglue for auto-levelling and wick-sealing:

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Attempted to start the stamps:

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...Which went badly:

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Smoothed the rail and reassigned the rear of the barrel jacket:

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Discovered that I was an idiot for finalising the barrel jacket so early in the process before I had the fine grit sandpaper and spot putty:

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Continued to engrave, this time with just an Xacto #11 with the tip snapped off (which happens within my first ten cuts with them), and it went better. Maybe no power tools this time:

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Tried a version with a wood burner on some card, which went remarkably well, I may combine these techniques somehow:

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I'd originally wanted to do it on plastic, but it melts too quickly and doesn't provide enough resistance to get good lines:

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So yeah, that's where I'm up to as of this afternoon. Still coming along nicely, but with the rebuilds it's been a little slow-going. Still, I think it's worth spending and extra day or two to get right at this point rather than continuing to rush through and regret it during moulding or casting.
 
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Howdy!
Despite my voicelessness recently I can assure you I have been tracking your progress with all the same enthusiasm!
The shame of my own lack of progress has kept me from posting until I have something worthwhile to show, i suppose. But hey, a name drop seems as good a reason as any to surface!

I have been meaning to contribute to the much deserved stream of praise anyway, this project has really become a remarkable piece and an example of the artistry I'm sure much of us strive for. I also doubt I am alone in my appreciation for the thoroughness of your documentation of the process throughout. Thanks for the consistency!

Now, excuse anything i may be missing given how late it is for me, but for the first pass at the stamps were you using the the rotary tool without a snake/pen-grip? If so i feel your pain, i use to build complex rig with clamps and guides to help steady the tool as i nestled it far too uncomfortably, and with lack luster results. I definitely advocate investing in even a cheaper version of the attachment if possible. Its not always better by leaps and bounds but it at least eliminates discomfort from the list of factors that keep perfection out of reach. I also couldn't tell from the pic if that is an engraving tip or more of a diamond tipped needle..? I have had better luck with designated engraving heads.

Another route with the benefit of a touch of authenticity would be to take some uniform letter punches to tin or very thin steel sheet and counter sink them into the appropriate faces (leaving just enough room around the edges to seamlessly merge it with some of that skillful Bondo work). I think if i had the patience to make it to the point you have, that would be the way I'd try it. Although, i just really like the touch of stamped metal, and given your attention to detail i can see why maintaining more of an etched, crispness may be of greater import.

Anywho, thanks for calling me from the shadows and keeping up the steady flow of eye-candy!
 
Howdy!
Despite my voicelessness recently I can assure you I have been tracking your progress with all the same enthusiasm!
The shame of my own lack of progress has kept me from posting until I have something worthwhile to show, i suppose. But hey, a name drop seems as good a reason as any to surface!

Oh, cool! I take it your helmet gadgetry and finishing are still in limbo then? It was going nicely, too.

I have been meaning to contribute to the much deserved stream of praise anyway, this project has really become a remarkable piece and an example of the artistry I'm sure much of us strive for. I also doubt I am alone in my appreciation for the thoroughness of your documentation of the process throughout. Thanks for the consistency!

Thanks! I hope it's useful for people, I do like to be thorough in documentation. Whether anyone else is crazy enough to follow along with something like this, I dunno, but hopefully some of the tips, tricks, and mistakes are helpful on an individual basis.

Now, excuse anything i may be missing given how late it is for me, but for the first pass at the stamps were you using the the rotary tool without a snake/pen-grip? If so i feel your pain, i use to build complex rig with clamps and guides to help steady the tool as i nestled it far too uncomfortably, and with lack luster results. I definitely advocate investing in even a cheaper version of the attachment if possible. Its not always better by leaps and bounds but it at least eliminates discomfort from the list of factors that keep perfection out of reach. I also couldn't tell from the pic if that is an engraving tip or more of a diamond tipped needle..? I have had better luck with designated engraving heads.

Yeah, I don't have the extension grip and at some point I do intend grabbing one, but at the same time, I'm not sure the extra weight isn't actually a good thing for consistency and smoothness. Wrist fatigue is definitely an issue, but even before that set in I wasn't too happy with the results. I'm using a 108 bit, a sort of upside-down conical carbide engraving bit. It's handy, but I'm starting to think something like this just needs to be CNC'd for that kind of precision with a power tool. My preference here would just be to laser etch it in acrylic, but I don't have a laser cutter yet. As always, that too is on the build list...

Another route with the benefit of a touch of authenticity would be to take some uniform letter punches to tin or very thin steel sheet and counter sink them into the appropriate faces (leaving just enough room around the edges to seamlessly merge it with some of that skillful Bondo work). I think if i had the patience to make it to the point you have, that would be the way I'd try it. Although, i just really like the touch of stamped metal, and given your attention to detail i can see why maintaining more of an etched, crispness may be of greater import.

Stamping metal was my initial idea, but then I looked them up and it's $30 a set! Assuming I could even find the right typeface, that's a lot of money for something that's pretty close to single-use. The pyrographic method seems to be going somewhere, I just need to hone it a bit, but it's definitely come the closest to the crisp precision I need and doesn't immediately destroy the curves. And you can pyrograph almost anything, really, which is nice. I just have to find the right material.

I also thought about putting together a set of tiny flathead screwdrivers and slowly chiselling it into something. That could possibly be even more precise, it would just need some smoothing in places.

Anywho, thanks for calling me from the shadows and keeping up the steady flow of eye-candy!

Ha, no worries, man. Glad you're enjoying the ride! Any more ideas or advice, feel free to chime in.
 
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