Someone say cake?

Shame the routing is off but at least I know they come out ok.
tasty.
i had a happy accident last night. 2x CR123A in series.. I epoxied 2 batt holders together, and realized.. For TCSS (not 1"pvc. maybe 1 1/4" pvc tho) i can rest the nano and WT on the back side of it. add some 3d printed fins (tie fighter) with and extension platform to hold the Mosfets, and sensors to keep it central, and then epoxy the Speaker holder to the other side,..
3d render coming.
actually, Canobi the board making jedi,.. the batt holders have pcb pins. you could mount your little board doohicky to the back of the batt holders. i think 7.4v is Jake approved if you are hoping to clone his setup. if you need a compact batt system. it may be the one!
Canobi, can you send, or post me a high-con (high contrast black and white image) of your PCB board and its dimensions. I'd like to make a 3D model of it, and then create a visualization of how it could be applied directly to a battery system. i think i can make a Hi-Con,. if you could tell me the lxwxh, that would be sufficient.
image attached. the white paper would be the cake.