Arduino Mega 2560 Screw LayOut

On the standard arduino drawing for the 2560, The most right bottom screw has no x position drawing. I am creating a file for a laser cutter using a very basic drawing package. Hereis it so far:

http://gyazo.com/48830397d5d7ed4521631c1482b6c082

That bottom screw I know fits up 2.5mm, but how far across does it go? Thank you all!

Standard image: http://www.flickr.com/photos/johngineer/5484250200/sizes/o/in/photostream/

That's not "the" or "a" standard drawing. That's a drawing that johngineer made.

For the "official" drawing, look at the EAGLE files.