Dual Rear Tire Valve Stems?

Another vote for the solid metal valve stems. They will probably be my next purchase before de-winterizing next spring. A couple of months ago I bought new tires for my Class C, and went to CW to get new braided valve extensions for the inside dually tires. Gave them to the tire store so they could install them with the new tires. Took a short trip a couple weeks later and had a FLAT tire on the left inside. Came to find out that the extensions were screwed on too tight which caused the leak. With those kind of braided airless extensions they have to be screwed on just right. Too loose and you can't check pressure or add air, too tight and they will leak. My advice is just spend the money and get it done right.