No rafts or supports, just print the box upside-down and lid with wider side down.
I used 15 outlines-wide skirt that touches the modes to minimize the risk of peeling off the plate because of the size, but if your printer is well-tuned, you don't need that.
Kapton tape would add glossy finish to top and bottom which looks pretty good with arcade buttons.
No finishing is necessary, just use a knife to remove the skirt, if you used it.
Tic-Tac-Toe Machine in action
I used Autodesk 123D Design, see a model attached.
Enclosure is quite tight, if you want it easier to assemble, just make the box taller.
P.S. I printed 7 prototype pieces (see last image) before it was good. Actually, last run was also a prototype as chamfer on screw holes was to low and I had to use knife to adjust it before updating the model.