Thanks.
Most templates I see have 6 buttons. I am starting to sway towards one set of buttons as I have found a small 19" rack cabinet that would be ideal, so my controls would hang out the front and one set may be more comfortable for the player. I am more interested in the old arcade games but the modern fighting ones would require two lots.... will see once I get the Jamma box. The screen I will probably go with horizontal will see what the instructions (if any) will say, may even put the monitor on a swivel base for both.
If I want to keep to the size of the rack then one set of controls would suffice, with 6 buttons it would get very confusing.