Question for you suspension guys. My forks are working great, I finally got them dialed in perfectly for most stuff. However lately I've started to bottom them at least once a lap, and once every couple of laps when I overshoot a tabletop or something I get a really harsh clank kinda bottom (ouch!). I want to add some oil but I'm not sure how much. I'm 160# w/o gear and the oil is currently at 130mm. Is 15mm enough to make a significant difference? Thanks!