Out of frustration, I put the build down for about 4 years, until after I got a 3D printer and I realized I might be able to 3D print some pieces of armor. I actually bought 2 sets of files, this one from Etsy and this one from CGTrader.
Edit: I think the chest is from CGTrader and the back is from the Etsy files. I wish I took better notes. :)
I also decided on PETG for heat resistance.
I scaled the back and chest down (I can't remember how much; I think it's at 90% scale) and did a few test prints:
Two different sizes. Left is 100%, right is 90%.
A partial print:
A comparison of the KB back and the 3D printed back:
Test prints of the back and chest:
The final back:
The final chest. It turns out zip kicker yellows PETG. Who knew!
The fun thing about 3D printing is that you can also modify the files before printing. I don't actually know how to use any modeling software, so I did everything in the slicer. Some simple mods were:
Cutting slots in the yoke, and I also shortened it so I could better fit my arms through (not shown in this pic).
Lowering the neck of the chest, and slightly shortening the tips:
Lengthening the 'wings' of the chest so they overlap the back more:
Here's the result of that. I'll fill the extra square:
I printed the yoke so that it will flex with the layer lines, but with the back being in 4 pieces, I'm worried about the flex, so I backed the seams with some extra ABS:
Here's a sizing check. Some tweaks for comfort and fit, but I was much happier with the size:
A comparison of the KB chest on the left and the printed chest on the right. You'll notice that the smaller chest reveals a new problem, which is that now the helmet looks too big...