TST Tire Pressure Monitor System - Interim Update

I have the Doran360 tpms and have been happy with it. Have never locked them in place or had one come off my metal stems. Doran does say NOT to tighten them too tight as that can damage the inner seal. I was also impressed with the TST demo in Quartzite. I do take the sensors off when not traveling to save the built-in batteries. My first set of sensors lasted just over 4 years.