I am just now trying out PAZ Springs.
At 2.5 turns in it grabbed almost immediately and lagged up hills. I just turned them in 4 turns from flush and it seems to grab much later, which is better. But we'll find how well it works tonight.
The best my clutch ever worked and ripped like nothing else (with stock springs) is when all the pads have been eaten and the arm 'stops' have worn themselves out so the clutch can open more than it was meant to. From a dead stop it would rev all the way to the top and fly. Of course it was grinding metal on metal, and virtually all slip, so that sucked. I have about 5 sets of clutches, both 2 and 3 pads, that I have eaten that I am going to get professianlly refurbished with, hopefully, a newer stonger material that won't crumble. When that will actually happen, I'm not sure.
I should also mention I do have _the_ Clutch Eater, and the HPI CDI, which is tiny and revs out really quick.