Nice looking Go-Box, Bruce. I did not have any trouble running BAP on a RPi-zero, but it is a bit slow when it comes to compiling or running some complexprograms. For example, the decode time in FT-8 is right at the cycle time so you get repeats sometimes, but it does work. No such issues with LinPSK, but that is not a time-sensitive program. The RPi-zero is so cheap that it might be worth just trying in your application and there is a competitive board with something like 4X the processing speed that has the same footprint and connection layout that might be worth trying. I don't see any heat issue from mine and I monitored it from the Conky display early on to be sure it wasn't getting hot in its little sealed case.
=Vic=
Vic WA4THR