This fits over the end of a 100x40mm server PSU designed to fit in a 1U rackmount server.

The hole in the side is JUST big enough for the 24 pin ATX connector to fit out, and I have connected this to a benchtop breakout board to allow for easy access to +/-12V, 5v and 3.3v as well as switching the power supply on and off.

The 8pin ATX and 1 molex connector are then used to power my 3D printer, via some custom cables.

Fits over the end of the PSU and hides the unused cables. Is a friction fit but could be screwed on if need be.

Customized version of http://www.thingiverse.com/thing:534527

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=534527