Also, the first (and only) cabinet I ever scratchbuilt was a cocktail. I built it in one day without plans, and it came out just fine. I eventually traded off just the cabinet/panel (no monitor, or computer), and last I heard it was a Ladybug or something.
Also, why so wide on the cabinet. Not even the huge 4-player cocktails were that wide. i have always considered 24" to be both the ideal and maximum width for any cabinet with a monitor under 27".