I think this may have been posted prior and I think I probably posted on the thread, but for the life of me I cannot find the thread.
As we all know, MMC used something "other" than the Miata flywheel and clutch assembly. And I can see the advantage of the hydraulic throw out bearing in lieu of the external clutch fork slave cylinder.
But why switch to another custom make of flywheel and clutch?
I checked once very early on when I got a hold of the an old Harley type compensator assembly from JV in Florida. The stub shaft that the flywheel bolts to and also has the pilot needle bearing located in it, does match a Miata flywheel bolt pattern. This was confirmed by my measurements of the old M3W stub shaft and a post in the Miata racing forum.
Aftermarket flywheel and clutch assemblies are very affordable and some are even lightweight racing setups.
Has anyone tried something OTHER than an original MMC setup? Inquisitive minds would like to know...

Thanks and have a great day!