Hey guys. This is my first time making halo armor. I am currently in the process of printing out the Pepakura files on card stock and cutting them out. I have a lot of questions regarding what to do after I assemble it all. I know that a lot of people are saying to use fiberglass for the inside of the suit, but it looks really flimsy still. I assembled a bicep piece last year and used a lightweight foam insulation spray to fill it. It didn't warp at all and left it feeling pretty durable. I was able to cut away the excess foam so that I could fit my arm inside. Does that sound like it would work well for the entire suit? Or should I stick to fiberglass? Also, how do you guys get the chest piece on? What would you think about cutting it in 2 pieces and using buckles to connect them, or just keep it as 1 piece? Thank you to all who answer! I can't wait to post update photos.