Ok. Its been a while. Honestly, got pretty demoralized and burned out when the chest piece was bad. I have shifted my attention to other areas of the armor for the past few weeks. Working on the "neck and back" piece, I think I am going to make most of it out of fabric. This cloth layer doesn't really show, and should be more comfortable as a fabric anyway. No pics of that right now, but rest assured some will be coming.
Also, I bondo'd, sanded, spot filled, and primed one of the shoulder pieces and bondo'd the second set of shoulder pieces. Those pieces came along so nicely, that I really didn't need much bondo-ing. I did also put the first layer of bondo on the last shoulder piece (top piece on left) I just didn't take another picture.
Also one of our window AC units stopped working so I had to rip that apart and thoroughly clean/fix it. That took a real long time.
The other thing that took up a lot of the past 2 weeks is a weird little idea I had. Its a little rough, but here's my idea:
For the helmet, instead of forming foam or sewing pads or whatever most people do to make it fit on your head better, I ripped the insert out of an old skating helmet. I then hatched a plan to secure it inside the pep helmet so that it sits straight and grips my head well. First, I tried to shave the insert to fit the shape of the helmet. I decided to ditch this plan due to having to remove so much of the insert that it wasn't going to stay together very well. Then, I decided to glue it in place and fill the excess space. But, how to do so effectively and easily? After searching and researching and thinking for (probably not) long enough, I landed on this weird process. I used general purpose JB weld and expanding insulating foam to secure the insert into the helmet. NOTE: I specifically looked for spray foam that bragged about not applying pressure to the walls of the gap it was filling. That outward pressure can warp and cause problems that I, obviously, wanted to avoid. So, I was able to find this low pressure spray foam that is advertised as for windows and skylights and whatnot that applies basically no pressure to the outside walls of whatever its filling. The specific brand I used is called "Great Stuff". Below are some pics of this process.

I do not know how well it worked as JB Weld requires 24 hours to cure fully and the spray foam needed 8. I did this last night so, when I get home from work tonight I will check and see if it worked or if I just destroyed my helmet. STAY TUNED!