After carefully aligning the trays, I drilled some 1/16″ angle to them so that they can be mounted to the instrument panel.
The 1/16″ angles are set back by the thickness of the instrument panel. Using a piece of scrap here the same thickness, you can see that the faceplates of the radio will be flush with the front of the panel once installed. Next up will be to cut the hole in the panel and subpanel for the avionics stack.
