Enclosure came!! It looks and feels incredible, @psychotiller did an amazing job.
However, I fucked up. Measured with one of my batteries and determined that I needed 0.5 inches interior enclosure height for it to work. It does.
Measure twice, cut once. I measured 3 times, did it wrong every time.
Anyways, I’m thinking of using some kind of insulation or rubber to add the extra 1/8 inch. If that gets too expensive, a new battery is only $25. Not too bad. Any suggestions that might be cheaper?