Attractive 75mm switch/socket spacer for smart switches etc

This is my design for a 75mm single gang switch spacer. There is a 10mm version with a 6mm flange which I have used to mount a smart switch onto a standard 25mm-deep backbox.

I designed this because the others I had found were functional but looked pretty naff. This one had a very slight (2°) draft to it to make it look a little nicer.

It also has a front recess to slightly sink the faceplate to make this look better integrated.

I have also uploaded a 4mm version with 2mm flange for other uses (dimmers, in my case)