I know there has been ton's of posts on this. So I'm sorry for bringing it up again. I did a search on it and it kind of answered my questions. I know Geo had a great post on this last year. But I can't get into the old forums. First off, Where is the true sweet spot? Does it start at 7400 or 7500? Most of my elevation is at 9,000 + ft. SO with stock clutch springs in both drive and driven clutch am I going to be okay running 70 gram weights or should I go heavier. I've got a snopro with the 153 on it. I know everybody is getting sick of hearing this but I have 70 gram weights and it would be nice if these would work so I don't have to drop the money on heavier ones. Maybe the cutler adjustable weights are the answer. I don't know, any input would be great.