Has anyone else had trouble keeping these Bead LOCK Setups sealed? I find it strange that the commander has never had a tire problem and I have had three flats with no sign of leaking from stem or foreign object in the tire, but when I pull tire apart, there is dust protruding in under the sealing lip of the tire against the rim. I have never run less than 8 psi, and only have 35 miles on the machine so far... I thought Bead LOCKS were supposed to be the $h1^!?