check out this thread:
http://www.rc-monster.com/forum/showthread.php?t=7933
I would go the dogbone route. It is SO MUCH better then MIP CVDs. I'm running my rustler on 4s and the look like they will hold up pretty well. The dogbones will be much cheaper in the long run too. MIP CVD require replacement parts occasionally sometimes that means you have to buy a new set.