I have a feeling it might want a bigger pinion/smaller spur. The ESC is ice cold but the motor is getting warm. The strange thing is I've been ready about 1:1 rollout being a bit of a sweet spot, and it's already around 1.2:1 with the 17t? I might just put a 16t in there and see if it gets hotter or cooler, easy way to find out.

Kieren