Recently returned new f5 (300 miles) to dealer thinking that i had a bad shock.The sled bottoms out totally in sharp stutter bumps.So much so that i have to pull flap out of track each time i stop.I have springs on the highest settings and nothing has changed.The dealer tells me that shock is working ok.I can not believe that a sled designed for ditch banging could have a suspension so soft.I have ordered a rear suspension stiffening kit.Any ideas or other suggestions?