TST TPMS 507 System and valve stem Question

mikenannie...ooooo, I didn't know there were different types of metal ones and didn't ask which kind it was. And yes, if I took the trailer to their shop, they'd charge more for jacking it up and removing the wheels.
bullrider (and others)...When I talked to Dan Covington at TST, he advised the flow-through sensors are 2 1/2" long, that is quite a LOT to be sticking-out of a standard rim and I wouldn't do it. No wonder your rubber stem broke.