Though my E-Revo isn't here yet, and upgrades are still a ways off, I'm already planning upgrades. I've read that lighter weight is good to a point, but it eventually becomes "too light" and performance will start to suffer. Can anyone tell me why that is? In my days of auto racing "adding lightness" is one of the best, and sometimes cheapest, ways to improve performance. I can understand if you remove so much weight that the truck's balance is skewed significantly, but in general I see no negatives. Can someone educate me as to what happens when you go "too light?"