When building a Case from scratch it's always a good idea to build larger than needed to allow for expansion at a later date if required. The extra material cost is nothing but will be priceless when adding a new card or anything.


Steel is my prefered choice and Painting is ok but any Ground points will need cleaning back to metal. Regards Star grounding then you don't have to take all grounds back to the case. You can just use a Bus bar and run all to this point, then take Ground wire from this to Case.

Other things I would incorparate is a Fan to pull air out and filtered vent to let air be pulled thru. Two fans could be used but not required.