We also use the tst system. Very pleased. Literally won't leave home without it. It has paid for itself in tires, where a slow leak like a nail would develop, but I would see it going down and able to pull off in a safe place and change the tire before it actually blows, and able to repair instead of replace the tire. Plus saves potential damage to the vehicle from the tire not actually blowing out. Also very instructive, I can monitor pressures and temperatures vs. load and speed and know when I am overworking the tires.
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