It's amazing how many things remain to be sorted out once a model is "finished"

I am addressing the reg issue today. One of the regs did indeed need a 6" extension between the Rx and the reg, so I am charging up the batteries fresh and then will see what the current draw is when both regs have that same extension and therefore the same resistance. If that doesn't work out, I will change out the reg that wasn't delivering current and see what happens then.