I'm trying to get my clutching dialed in and would like to hear a few opinions. The sled is an 07 M8 162. I did the shift assist and hard rock rollers on the secondary with stock spring and helix. I put a gold primary spring in and have been playing with weights. With the stock 68's I was pulling about 7860 rpm on a hill pull at about 8000 ft. I changed the weights to AC 72's and pulled the same hill today at about 7600 rpm. I weigh about 210 with gear and mostly ride 6-9000 ft. The sled seemed to pull pretty good at 7600, but I'm wondering if I get into some heavier snow at 9000 ft, is it going to fall on its face. I guess I was thinking of shaving a gram off them and trying to get a few more revs. The engine is stock, except for an SLP can. Any comments?