I have one, my dealer adjusted the clutch alignment after I installed it last year during my preseason service. I always have had great belt life on my sled; either way I think it is worth the money, if nothing else to put less stress on the motor mounts.
Took pipe and can off. Did not take off primary or y pipe.
Intalled bracket and two bolts into block with loc tight.
Then installed arm with loc tight but didnt tighten.
Put u-bracket on frame. Spun arm till i could barely install bolt threw u bracket then tightened bolt and nut till tight.
Tightened bolt threw rubber end.
Tightened jam nut mid arm.
Seems like when the u-bracket crushed it would loosen up but it didnt. Not sure if i was suppose to crush it but bolt had alot of threads so i thought best to not have the u-bracket pulling on threads in shear, better to pull on shank.