RE: single battery possible?
Actually CAN be done and SAFELY...
Put in a WIKE IBEC .... (can be purchased from Troybuilt or MagnumRC)
Not only does it TOTALLY stop *any* type of 'noise it also give
an added feature of TX engine kill w/o using carb...
Run direct from RX to ign, set end points at 100/100, set to a switch... DONE...
Works on 2.4 or 72...