This is a remix of a superb mounting set for the IndivisonAGA MKIII for your Amiga 1200. Sadly the original mounting plate won't fit the new A1200.net case because the mounting hole isn't round anymore. So I removed one of the four mounting holes for the port-board and widened the mounting hole so it will fit perfectly.
I also added a minimal modified HDMI slot-cover so you can print both with Cura or any other GCODE generator.