Raspberry Pi Case on Ender 3 Mount

I wanted to put my Raspberry Pi 2 near the Mini-USB Port on my Ender 3 printer and use my existing case. So I created a holder for the case, that i can screw it on the 4040 rails.
In the bottom is a big hole, so that the Pi can get fresh air :-)

Hardware used:
2x M3x8
2x M3 T-Nuts

Perhaps the mount does only fit this type of case!