I have the TST 507 system on all 10 tires, it's worked flawlessly with no booster & user changeable batteries.
As far as air pressure, I use a good digital gauge to set the tires & as long as the monitor is close it's good enough. You'll drive yourself nuts trying to ever get them to read the same, just watch for big increases/decreases & higher temps than the others. The pressures & temps will vary greatly depending on ambient temps.
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Fulltimed 10+ years
Sold '13 Thor Redwood 36 FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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