With a help of a guy we designed a steel case in AutoCAD (after noumerous test with paper box to find the proper sizes,distances, ergonomics ).
It consists of two parts that come together with just for four screws.
Once finished, I took the file into a company that cuts steel and had it ready in 5 minutes.
I prefer steel to wood because it is robust, has the correct weight and you can build an arcade stick of less height, so more relaxing while playing.
I have painted it with electrostatic paint and fitted with anti-slip pads.
Since the holes are of universal standard I can put whatever buttons I want and also most Seimitsu and Zippyy sticks fit.
Two pics