SevenSwitch FET case

This is a simple case for the SevenSwitch http://reprap.org/wiki/SevenSwitch_1.2

I printed it in PLA using 0.2mm layers with no support. It prints fine, and clips closed with no need for screws or similar.

Designed in DesignSpark, this is an original design, not based on any existing work.

Other parts designed for my printers include:
- http://www.thingiverse.com/thing:1959901 (GT2 belt clamp (Prusa Y-axis)
- http://www.thingiverse.com/thing:1937232 (Arduino Mega and RAMPS v1.4 c