So my ESC fried today after I got the diff put back together, but I figured it was happening since it was giving me problems for awhile now. wanting to know a good suggestion for a ESC that will run cool, or even a combo with a 3900kv motor. I've been looking at some and reading a bit and found out the Stock RS SC700-BL is pretty much garbage. Found that castle and mamba are supposed to be pretty good upgrades from stock. wanted to know if changing these parts out though would be against most regulations for a track day.