Unfortunately, I've already got 5 stock .095" frictions (alto reds) because I was told the billet steel drum I bought was designed to use that arrangement with a stock piston. Sounds like the options are either to (1) have the pressure plate machined thinner and maybe use a thinner snap ring, or (2) replace two of the thick frictions with thins? Just seems weird to have thicks and thins in the same clutch drum.
Since I don't have access to a lathe, I'll have to see what a machine shop would charge to take .030" -.040" off the pressure plate. Maybe that can be done on a brake lathe?
Thanks for the input guys!
