I installed mine last night. Overall an easy install other than that retainer ring, what a pain in the ass. I doubt I will see slipping as I don't ride that aggressively nor do I take it to the track, but there is tuning that could be done with this kit. I think a mix of springs 3 soft and 3 hard would be ok because the clutch halves are very solid. I don't see why you couldn't do a piston swap by itself, it looks like they traded some travel for force.