Nest Gen 3 Heating Single Gang Back Plate

I have been holding off fitting my Nest Gen 3 as my original heating control box fitted to a single gang socket. The new nest is slightly bigger and I didn't want to have to start drilling holes... So I created this :-)

You will need 2 socket screws (most likely have them from your old control unit). I used 2 x 26mm M3 screws and nyloc nuts. The nuts are pressed into the print to make them captive.

First, press the M3 nuts in, fix the plate to the wall and then fix the nest box using th