Ok - i made a step in (I think) the right direction.
I will get the version with smoke and RX18, but without the metal parts for 110$, and buy T-81 tracks and gearbox from rctank - only if someone could tell me if the RX will not burn when I connect the upgraded gearbox
Edit: can anyone tell what this does, and is it needed?
http://www.rctank.de/HQ-US-Pershing-...metal-sprocket