Even 13/42 is going to be really high for the MGT. It's diff's use a typical buggy ring/pinion tooth count as far as I know, its pretty high up there, like 43/13 for the ring and pinion. I run 9/51 and 10/51 for my pinion/spur gears, anything more and it's too fast for my tastes. I made a video of it with 13/51, and it flies, so unless you have a lower Kv motor than mine (I have a 1550Kv on 6S), you are going to be hitting some really high speeds.
That looks awesome though man, really nice setup. But we need more pictures!!!
