DIN ring mount for 65 mm diameter / 50 mm deep drywall electrical device box

I have an IKEA SAMLA board hanging on my study's wall for KNX hardware test.

The board has DIN rails which is a perfect mounting solution for most of the devices - except the pushbuttons which require a round electrical device box. 

I did not want to replace my beloved SAMLA board so I have designed a DIN rail compatible mount for those round drywall boxes.

I have uploaded the Fusion 360 file also so you can check/alter the dimensions in case if you need.