My objective is to make my frame lower and slacker. I have a 9.5" Roco WC on it at the moment. I am considering picking up a 5th in a 9"x2.75" and doing the shim mod on it to slack the bike out/lower it as a secondary shock or experimenting with a thicker top out bumper (1/4" - 1/2") under the piston head in the Roco damper the next time I rebuild the shock. Has anyone done this with a Roco or any other shock? What supplier would have this and what are the dimensions/part #? This is for an R9 by the way. It's a couple years old and the geometry has been tweaked on the newer models to be a degree or so slacker, and my BB can never be too low.