[bdebde]

Yeah, many 6s will fit mikes tray, just check dimensions.

I won't even mess with 4s for the GTP, I have a spare MM and lots of 4s batts, so I could run it now, but the SPEED would not be that fast (or at least not for me). 4s may be ok if you have a two speed or don't want it to go that fast. I will wait until I get another 6s controller, and for better weather, then I will unleash the beast.