BMW E30 - adapter to flush mount the radio

A modification to the heater control panel for the BMW E30 to have the radio flush with the control panel. This adapter sets the radio ~7mm back into the dashboard.

To be able to use this adapter piece, you will need to modify your heater control panel slightly.
The original brim where the radio mounts onto will need to be carefully removed around the whole perimeter (only the bottom brim that is removed is pictured).
(I used a flush cut plier and cleaned it up with a file, a Dremel will also do the job)

The adaptor piece fits onto the existing reinforcement ribs between the upper row of switches, if you prefer, it's possible to add glue here as well. However is should be sufficient to only rely on the three mounting screws (two screws of the OBC/clock and the third screw of the heater control unit, you will need a slightly longer M3x8mm screw)

Orient the print as shown in the pictures, using some supports as well.
I used ABS to print this adapter piece since this area tends to get warm above the heater core

This modification is since now only proven on my BMW Bavaria C Bussiness radio.
If your radio originally also clamped on the small brim around the opening, it should also be able to mount in this adapter.

In a future update I'd like to also include the cut outs of a 1DIN frame to have more mounting options for other radios. Id you happen to have a 3D filet that I can use to included these openings, please let me know to I can update my model!!

edit:
Thanks to the community I was able to update my model to fit the steel BMW radio frame (part number 65121375737). This should make it possible to fit aftermarket radios as well.
I added a new model named E30 Radio Adapter - BMW 65121375737