Sorry to bring this up again but I have just done this mod ... I used the F3 damper rods including rebound valves, and fork caps. I retained the VFR cartridge bodies, compression valves and lock pieces.I installed Racetech .95 springs. I figured by using the VFR cartridge bodies the rebound springs would be in the right position, and fork extension should be same as stock. I haven't had the chance to test it out yet, but would appreciate any thoughts, or experiences ..