A Slash and a MMM combo

[jacobsjo87]

I have a crazy brother that wants to make th most over-powered slash possible. He wants to run a MMM 2650kv system on 4s. Has it been done? From preliminary measurements I dont think the motor (41.78mm diameter) will fit in the gear box. So he would need a FLM tranny case, but then there is still the question of if the size of the motor will allow it to have good gear mesh with different gearing options. Has anyone tried it, or have any input?