I am getting rid of my polaris mod and going to pick up an 05 rev this weekend, the sled is stock except for an MBRP can. Are there any issues with this sled? Since I can't leave anything alone are there any aftermarket things that I can't live without? What about clutching, the guy says he hasn't touched the clutches? Is there anything that is a must do as far as clutching. I have worked on my poo a lot, but know nothing about the rev, any advice would be appreciated.