There's been discussion on here before regarding the cracking that occurs in the small holes of virtually every make of clutch disc. Just noticed AP makes a 4-puck and 3-puck disc that shouldn't have those issues.
https://www.burtonpower.com/ap-racin...400-a036h.html
I used to use a 4-puck on my FSV - it was a off-road buggy part (not any of our usual FC suppliers).
Has anyone used these discs and if so, what were your impressions?