Dudes, I put on one of these chassis kits with the Rustler parts, and OMG, my slash doesn't roll over any more! I actually let my 8 year old drive it, and he did awesome with it. Much easier to control. glides across bumps, jumps well, and rotates on a dime! Very much worth the $40 bucks since I already had a rusty laying around that wasn't being used. The product did what it said it would do, get your slash back on the track and be competitive. You don't need a protrac kit, mine does awesome with RPM parts. Even with stock wheels and tires, it got around the track impressively. I was holding out to see how it would do before I invested in some new kickers. I was sold, so I bought some MC Bowties for the rear and m3 bowties for the front, should stick to the track like glue and have traction to spare. I went with 42.5 shock oil all the way around, hence the gliding over bumps.
I want to hear from some of you guys out there that have this kit and your set up and racing results, was it worth it to you I guess is what I'm asking !