[Halon]

I'm sure you already know, but act redesigned their PP's and discs awhile ago. Thus if you happen to be using mismatched disc and PP's, they will likely drag at lower rpms. Just throwing that out there in case you didnt already know.

As for twin discs, I never ran one because I heard the harmonics they create are hard on the transmission. Which so is clutch drag, so pick your poison I guess.