I have aluminum wheels and the valve stems point outward, would like ideas on protecting them better so they don't rip out when rubbing obstacles, etc. Found these flush mount mount valve stems, but the one review has me concerned. aluminum weld-on rock rings? I checked Trail Ready and Copperhead Fab websites, didnt find anything. I'm sure I could contact any number of vendors though and get something quoted. Would 1/4" thick be about right? any other ideas? I don't want to invest much, would like to use my existing wheels.