Thanks Timoe & Leapinlew,
I'll take a shot of my CP with dimensions and post it shortly.
I'm looking for ideas on control layout - and you're right Leapinlew, I should have provided more info, sorry about that. I'm hoping to create a CP on which I can play most of the classics from my teenage years (I'm not into fighters so this isn't a consideration); games lke PacMan, Asteriods, Missile Command, Vanguard, Robotron, Galaxian, Defender, Tempest, etc.
I've cut several CP blanks, so I do have the ability to make more than one CP if needed, but I'm hoping I can put together a one CP design that can handle most of the games; isn't everyone

Will post again shortly and thanks for the help!
Breaker.