This is a box I designed for my Fanatec CSL DD. It's 3 parts, requires minimal supports and can be printed within 24 hours in total. There are three total parts, Button Box Cover, Button Box Backing, and Fanatec CSL DD Bracket. I included a step file of my build out as well.

This uses momentary toggles, 3 way toggles, push buttons, rotary switches and an arduino pro micro. This requires soldering to complete the entire build out.

I followed this video for the components and wiring. 

This model is a work in progress. I will regularly update the STL files on here with newer versions if issues arise in assembly. Updated V2 has snap clips instead of screws and spacers on the mounting bracket.