I have been remodeling my bathroom.I installed the plumbing for a bathtub/shower and tiled it all in.During construction I periodically turned the water on useing a set of pliers ( I did not have the handle installed) to test for leaks and to clean dust in the bathrub.Yesterday I went to install the handle and discovered I stripped the teeth on the valve stem. There is an adapter with a female end with teeth that slips over the valve stem and a male end with teeth that engages the handle. The adapter just spins.I either have to remove tile and install a new faucet valve, or somehow dismantle the faucet valve and install a new stem, or figure a way to permanently attach the adapter to the stem ( glue? solder?).Any suggestions would be appreciated.