ATX PSU mount

Just a mount for an ATX PSU for my Prusa i3 (Hesine) printer.
But, before you read further, check the "Power and Controller mounting for Makerfarm Prusa i3" by moczys, http://www.thingiverse.com/thing:620172.
I saw it only when I was about to publish this one and I find it much nicer, more elegant.
I would have adapted it to my needs, if I had seen it earlier.

The PSU is a BeQuiet PSU Power 7 300W, but the mount should be ok for some others with the overall measurements of 86 x 150 x 140mm.
Check also the ventilation openings etc.!!

The mount should be ok for other printers too but the holes correspond to the ones that are already in my printer.
I made the holes a bit spacious for the 3mm bolts needed, to allow for a bit of variation, so some washers wouldn't go amiss.
Those things under the bottom are supports for some tie-wraps or such.
The thin stiles in the bottom-holes should afterwards be removed.