20A PSU cover / switch / connector

This is my design of PSU cover for 20A (and maybe other) version.
Designed for my P3steel.

The hole for the connector is 27 x 20 mm.
The hole for the switch is 30.5 x 22 mm.
Wall thickness is 3 mm, so you can use a clip-in switch.

Inspired by: http://www.thingiverse.com/thing:587196