After installing the shower/tub walls, I am 1/2" away from the walls with the escutcheon. Because I did not understand the instructions, I needed to take the round plastic guard that goes behind the wall off or the wall would have been out to far. The shower/tub is installed so I am looking for a way to install the handle so it is tight against the escutcheon. The shower/tub Kohler part number is K-T11552. Any help or suggestions would be appreciated.