Which main and which pillow springs are you using on your setup?
I'd have to go double check mine, but I think I'm running the green mains, and I don't remember what pillows. Basically the stiffest they have to get the clutch engaging as close to 12,500 RPM as I can. I think the greens are 31kg or something, I don't remember though. I hope you like the clutch. I fell in love with it, and I don't think I'll go back to a regular clutch, that's for sure.
Happy tuning!
~Josh