I got a Savox SA-1231SG 444oz-in 6.0v servo, its a amazing. I had it out for a bit and i love the quick turns its a whole different truck... servo save needs to be tightened up yet but it is much better. The video is on 4s. I did a quickrun on 6s but have mis matched batteries so i was only out for a few minutes. I turned BEC down to 6v i think... need to buy a hobbywing programmer or swap ESC to mmx.