for reference. Flat side center and high side. Disk wise. If not mistaken flat side should against the flywheel. Which is how i installed it. My slave cylinder was not compressing properly. The piston was stuck in. I figured putting a new one on and bleed it. Wouldn't be this long to do. But...
I know this is an thread. But i just made an account. Recommend by another mazdaspeed person. But i definitely having this issue after replacing rear main seal. I could not put the car in gear whole running. Im still iffy on if the clutch disk is right after i put a new one in it but all...