i installed the 4 shoe clutch last night. it needed a spacer behing the fly wheel & another between the fly wheel & the clutch nut to get the clutch bell & spur to lign up. i put the fly wheel with shoes on into my drill press, fired it up & sanded & filed the shoes to be the right size for the clutch bell. i didn't want to mess with removing material from the clutch bell, i measured the balance on it & it was perfect, no point messing with that. the balance on the fly wheel & shoes is good too. can't wait to give it a bash & see how it holds up.