PCBWay reached out and offered to provide some help on this project, which has reinvigorated me to finish the cad model and get some parts off to them to get printed on much better printers than my hacked up Ender 3!

Here are some updates on the cad model - it's a bit of a chonky unit, but that's what I get for hand wiring everything. I'll be be able to fit a few lipo pouch cells in there though.

 I'm going to have the black part printed in TPU, and then I'll be able to stretch it over the nylon body. Then it will be capped off with the yellow bezel, which will be CNC machined from aluminium.

I'll update when I have some parts printed!