No over rev.
I run rich and have adjusted my throttle linkage to make sure nothing gets out of hand.

This is the car that I hand over to my buddies when we are out at car meets so it has to be idiot proof. It is going 2.4ghz to make sure interference is not an issue either. It is nice to have a truck rather than a car for its ground clearance and durability. Even if someone crashes in to a barrier, it just drives away as if nothing happened.