Very cool to see the build going on! Looking forward to updates...

TCS - will reduce engine power and apply one or both brakes on the drive axle to control wheel slip to improve 1) stability, 2) steerability, and 3) acceleration. So you can see, you don't want it.

I've been instructed that a factory-style clutch pack diff is the best, but maybe that's another sort of religous debate... I'm using one 'cause that's what was cheapest!