I need to replace the cold and hot water handles in my shower and my tub/shower. The water handles have been off for sometime and we have used pliers to turn the water off and on. The stems have been somewhat “disfigured” from the use of pliers. Is there a way to replace the stems and attach new handles without removing the tile and wall around the pipes? Or is there some other way to do this? (At one time I tried replacing the handles with the adapters that are supposed to make them fit the existing stems. However, that didn’t last for long.) Thanks for any assistance you can give me.