I installed it this morning and flew it. Wow, I am impressed. The tail is much snappier, and when I increase the throttle, the tail doesnt swing out on me like it used to. The only pain I found was trying to get the new belt idlers on. I also think my belt might be rubbing against the tube or something. It looks like it is hitting the top of the boom as it comes out the tail end. Anyone know how to fix it?

I think you have to use the belt that came with it. There is quite a size difference.