I searched, but didn't see where this was addressed. I'm getting ready to tile the surround from tub to ceiling. I'm using 12 X 12 tile. The end walls will have a total of 36" of tile from the back wall outward. I will be using a bull nose trim (12" long each)vertically floor to ceiling. My thoughts are to do the back wall and set the bull nose first. The start from the bull nose and work toward the back wall so the cut piece will be nearest the back wall. Is this faulty logic?