Hi. I am not a plumber and putting in a new tub....and a new valve. My question will be stupid I assure you!! LOL!!! On the Kohler Valve, there is a plastic "housing" called a plate (looks like part number 1095944). My question is, "Do you remove this"? I know there is a Dome plastic guard that is removed. I was talking to a buddy who is a plumber and he tells me "Yeah stupid...you have to remove the plate...it is just there as a guide for the rough in and cement board" I told him I have not read or seen anything that refers to removing it....and that I screwed the plate to support 2x4's. Any help would be much appreciated!!!