Memories fade like shocks on a Sat afternoon trail, but it seems like my sled rode better without the Boivin couplers. All who have used them sayhow great they are, yet in the real rough stuff I still take a bit of a beating. I never got any set-up info as I bought them used. I did do some general stuff that I read in Snowtech, but I hate the fact that other brands actully ride better. This susp. should be able to keep up with the best. It`s a 97 Mach Z. I`m a heavy rider, shocks ad springs are stock. Fronts full soft, center full soft, rears 1 or 2, ACM about 1/2 for trail. all the way out for drags. I had no weight transfer problems at all last time out but the ride kicked my azz. Any inputs would be greatly appreciated.