I basically copied riedmans battery, theres pictures on the 3rd page of the thread I linked. I was able to find that pcb board and put it all together. You have to get some extra thin abs sheeting to close it all up on both sides because the batteries and pcb board wont all fit in there without doing that. If I did it again too I would probably try to get some kind of tac welder, it was a little difficult soldering the batteries, I was worried about overheating them but I eventually got it all together.