After tiling, my wiser controller was a bit messy, didn't fit nicely on the wall, the electric back box was deep in the wall and the controller didn't sit very flush. Plus tiling was a bit messy. I created this back plate, which the controllers main fitting goes in front of, this sits as a secondary back plate to keep it all level and solid. Needed longer screws. Will be printed in white for cosmetic.

Basically a 5mm deep plate like a blank switch cover but slightly enlarged in width and height all around, plus a larger area to the right.

Size is around 105mm height, 160mm width and 5mm depth