Like said, the best option is to stick with one manufacturer, that way you know the products should work as advertised. Believe the SBC disks use to work with ACT PP's, no problem but ACT made some changes & its no longer the case.

I'm running the SBC SS PP with the TZ/FE disk. So far so good but haven't really abused it yet. It does engauge about 3/4's of the way up as well.

Believe SBC is also working on a revised SS-X PP (think its out by now) as there were some issues with certain disks, believe the FE.

I ran a act flywheel that was stepped too shallow with my last clutch setup (measured around .605-.606 with my PA dial indicator). Figured oh well, the disk will wear & it'll be fine. This is probably not the case, that setup dragged after about 5500rpms when testing. I just ran it as it seemed to shift alright but I'm starting to think I hurt the syncros in my built tranny