I run a 4cell GTB in my 12r5. I have seen a few people post that their running a single cell lipo with no problem. I need more information on this. Can anybody tell me more about it. I want to do the same in my car, but I don't know if I will need a booster or a seperate rx pack. I run the old Spektrum receiver (the old solidgrey case), and the 9650 Digital servo from Futaba.