You don't have to prop up the original case if cooling is done correctly not even a single extra hole to drill. You can still use the original trap door cover even at 300Mhz+
But cooling must be done correctly. Get cooling wrong and you could damage the card.
However I do recommend a little cut out internally at the trap guide to release hot air around the card area but this is not visible when original trap cover is replaced.
A1200 will look normal with no visible modification when viewed externally as its all internal.
Last edited by delshay; 06 November 2012 at 21:01.