i set the sag like have read to in many threads and posts and once my 180lbs is sitting on it, it feels like a rock and feels like there is no rebound at all. when it hits bottom it seems to hit bottom and does not feel like it comes back up afterwards like it should. maybe i am spoiled by my floats up front but i would've thought i could get something more out of the back after a rebuild. and yes they did charge me for the spring