Cheers to starting your build thread. Theres been lots of progress in the build thread to adding things like hearing amplifiers in helmets and different speaker systems that people have playing around with. If I remember correctly
JTF4 has some experience with the different things we've tried in the last year or so.
The hearing system a lot of us have started using is written up here by
CrimsonViper97 :
Communication is difficult on the con floor, so why make it harder than it has to be. The following guide will help you take an off-the-shelf pair of ear protection and adapt them to your helmet of choice. I first saw this technique used by PapaBraus on his MK VI helmet here: 3-D Printed MK VI...
www.405th.com
It's a great system and can help improve your time at any convention while in armor.
As for microphone, as far as I'm aware most people use a voice amplifier bough off of amazon or the like. I've found the biggest problem lies in the bluetooth ones get a lot of feedback so using a wired mic is neccessary. I'm currently looking into a personal fix for this myself.
As far as adding LEDs into the armor it's just going to come down to finding a file set that has the light spots already built into thier files or finding a set you like and modifying them. Luckily most of the great folks who make armor files took the lights into account already.
Any help we can offer for your build let us know.