Aluminum extrusion all cut to size thanks to Mike Smith. Do you need to drills and tap or can you use the brackets that Misumi provides?
I assume this is a Eustathios? If so I recommend doing both the threaded ends with matching cross holes in the extrusion to allow axis to the buttonhead, and the misumi corner brackets. This makes for a very ridged frame.
@Eclsnowman Yes this will be an Eustathios with 2 variations. Increase height and the bottom will have extrusion around the base rather than have legs. This will be to inclose all electronics. Thanks for the advice.