Search the topic there are a lot of good points between the two drive systems, here on snowest. I am running the cmx and I absolutely love it. The cmx system is a complete system just not Pullies and a belt. The brake on the track shaft serves at least two good reason to have it there. One if belt breaks you still have brakes. And two the load of the track force on the belt is less with the bottoms shaft compared to the top, more cogs and also you are stopping the track shaft with the actual brake and not stopping the track with the belt having the rotor on the top shaft. Call mark at cmx. He is a great guy and can explain it all better than I can. Like I mentioned before the cmx you are getting quite a bit more products that's why it's more.
Jack shaft, Pullies, belt, rotor,brake caliper, steel braided break line, track shaft, drop and roll back and down a 1",
A great fix for the '13 pro, no more weak belt and also no special collar on the track shaft.
