thanks...one thing I did was put some light rubber canvas inbetween the two fenders to keep stuff from coming up inbetween the two fenders and a set of those black frilly hula girl type deals that mount on the inside and outside edge would help with rock throwing..esp on the inside side...I've got lots of lots of rocks that get thrown under and around my fifth wheel, and knocked my back window out on the sleeper...if I had them maybe it would have kept that from happening. did you get the chrome straight mount or the offset mount? I had the chrome jobbies..I'm a self proclaimed chrome-aholic!, but I'm switching them over to the offset due to my drill not making the hole in the right spot(not my fault, the drills, hahaha) then it would buckle the fender a little too much and not put the right arch on it, plus the offset are heavier built. I've tore three fenders off, but I keep putting them back on...I guess I'm addicted to them.