I hate to break it to you, but you are not really going to be able to save a whole bunch of space rebuilding the cabinet. Almost any game sitting there by itself takes up roughly the same chunk of floor space, doesn't matter if it is a little single player cabaret or a 25" cabinet. Any space savings would literally be measured in inches, not feet. The main body of a Konami 4 player cabinet is all of 3" wider and 4" deeper than than a single player Centipede cabinet, and most cabinets are about the same size as Centipede. I am assuming here that you already eliminated any sort of flying wing control panel jutting past the body of the cabinet in all directions.