The only changes i have been making is wether I use the trimmed shoes for tracks with short run ups, when I need that extra snap. And for more technical tracks I use stock HB carbons, both set ups w/1.0's. I am about to give the answerrc carbons a try and they come with the full set of springa and I want to try 1 1.1 and 2 1.0's and 2 1.1's and 1 1.0. I also saw someone drilling 1-2 1mm holes in the shoe instead of trimming. I guess that would be more exact on the weight coming off. But when I trim I do 1 and use that for a template. I tried the carbon and alun mix before and had no liuck with it in my truggy last year with the PTM 5 port. Tore up bells and the carbon shoe didnt last half the time of the alum. But when I did use alums I used the Mugens both the LW and regular versions. Lots of guys have been loving the Dynamite long lifes at my local track and seem to last pretty good but I dont need all that snap. I would give them a try though.