slash 4x4 protrac vs slash 4x4 stock

[sportsstar298]

i was wondering if anyone uses the protrac and does it help the performance of the slash. also does any body have pictures of the protrac slash next to a stock slash so i can see how much bigger it will be.
i am deciding on buying a slash 4x4 or a stampede 4x4

[akesj1]

do a search, there is a couple threads, they are approx 7-8mm wider on each arm