The chest armor is coming along nicely. It's based on the pepakura files. The fit is a bit tight -- the shoulders are perfect but the ribbing under the armpits is a little too snug. Probably because I don't have a He-Man body like Gordon Freeman. :) Going to piece in a panel under each armpit to add some breathing room. If that doesn't work I may have to rip out the ribbing entirely and and rebuild it with less tapering.
The masking tape bits are keeping the armor closed. My plan is to put velcro there so I can get in and out.
Update: the surgery to add a little extra room worked. Additionally, I rigged it so the opening for getting in and out is under one of the armpits instead of on the chest. It's a little more hidden that way.