I am just shooting for 10 minutes on an indoor track. I have a few turnigy 4 pole 540 motors to try first hopefully they will have enough power and efficiency for what I need otherwise I will get the tekin. I have a couple 100c 2 s packs already that have very little use ( orange trinity,race prep ones) I think they are around 6000mah i also have a few thunder powers that are a bit older but very good packs. I was thinking of using some smc shorties chained together to make a 4s not sure how that would work out. Anyone try shorties?