I think you are right Ray with. You had just bought yours and wee still at the booth when I got mine. Had we gotten 15% that was offered at the earlier rally (Hatteras or Jersey) that would have paid for an additional sensor
I also bought metal valve stems for ALL my wheels, 5 & 5. Now I don' need them and I do need 2 more sensors. The new truck has 6 wheels and I bought new tires and wheels for the trailer on the way home from Trail Air last August. Since they were the high pressure wheels (135 PSI) they came with metal stems.
Hope Shiny will take my stems back