[travelin texans]

X2 on leaving both tanks open & also on the cold middle of the night outdoor switch, never again.
I've tried the gauges you screw onto the bottles, stickons to read propane level & both are about as accurate as my holding tank sensors, so now when the changeover turns red one tank is empty.
There was a mod on another forum that the fellow cut a window in the plastic cover at the changeover valve & sealed & bolted a piece of plexiglass over the hole, no more removing cover to check. This sounds cheaper & possibly more accurate than the sensor system.