F7 Clutching - What Have you Tried?

I started with a D&D Kit(63 Gram weights, stiffer Primary and Driven springs and I think a 56-52 Helix), it felt pretty good off the line(although it had a slight bog) but fell flat on it's face at about 90mph. So then I changed the Helix to a BM 60-49 which seemed to help better on top. Clutch engagement wasn't as high as I wanted so I switched to a teal D&D driven spring (185/295) and 65 Gram D&D big dog weights(Iknow they offset each other) and went back to the D&D helix. Backshift was junk, so I went back to the 63 Gram weights. Now the sled leaves hard off the line, doesn't over-rev like stock, it's just a nice even pull. It hit 104.6 in 1000' this way on radar(with only 21/42 gearing - it was almost out of gear), although it's now underrevving at 7500-7600. So I've now ordered some 62 gram weights, which I will try with the teal drive spring, but If it is to stiff I'll put the original D&D Clutch kit spring in. I will also put 23/40 back in it as that really seemed to work.

Basically what I want is for the thing to leave the line violently, not overrev, and hold 7700-7900 rpm the whole way through.

What else has everyone else tried? No bashing please, just share your experiences and thoughts, on specific things you've tried. I know the Dakota Performance clutching kit works well, but I have so many parts myself I'm trying to come up with a good combination.