It frees up your drive train some and you do not have to cut them perfectly off...but try to keep it neat with out knicking the fibers of the belt. My belt tension did not change much from where it was before I cut the belt. I have only run this with a stock and 19t motor so I dont know how it will work with a mod motor.
Maybe Todd can let us know if hes run this with a mod and how well it holds up.....and also if the new belt and pulley system they have been running will be released to us mortals any time soon?