Design for a frame & cover to let you "replace" a light switch with no changes to electrical wiring needed

Right, here’s the modified version of the full cover with a recess for the Philips Hue Dimmer unit. It’s now a completely flat front with the inset area for the Hue Dimmer to sit in.

I’ve omitted the front bevel as per Paul’s suggestion (@PGale) , but kept the rear bevel as it does look better with it I think.

Click on the images to enlarge.

The sides are straight, and the top and bottom edges flare out in the same manner as the previous design to give enough height for a “wall” above and below the Dimmer unit.

I designed it to leave 1mm clearance around the remote when it’s in place.

What to folks think?