I need some advice here gentlemen. The new dually is a dream to drive, but the tire valve stems are a PITA to get to. I even went to Napa and bought a 12" tire inflater for my air compressor, and it's still a pain. I was thinking of getting one of those hose kits that join the valve stems together and then position the fill valve near an opening in the rim. Question is, are they any good?? Do they hold air without leaking? And what if you get a hole in one of the dually's, do they both go flat?? Any practical experience is welcome before I go out and waste money if they are no good... ... ... ... ... Thanks, Sarge