Hi, here are very very accurate spacings for the XL-ATX board.
 
I took the measurements from a ATX PDF spec sheet, and than measured the other spacings with a micrometer.
 
The overhang is exactly how it is on the EVGA classified 762 board (XL-ATX 4 way sli). So the outter limits are the outer edges of the board.
 
The diameter of the holes are for the holes ON THE BOARD, NOT the holes u need to drill.
 
You need to use a #36 drill bit, and a 6-32 Tap.
 
I used it for my FERMI 2 custom case which  you guys can check out here:
 
http://forums.evga.com...083&mpage=1#602094
 
let me know your feedback.
 
If anyone needs the PDF or CAD drawings for the the XL-ATX standoff spacings, let me know. I got it printed at a printing shop and taped it to my surface and used a dremel with a router attachment to drill the holes, than tapped them with 6-32 threads.
 

Very nice.