PSU Case

#### This is a simple case for a switch mode PSU. I needed a 24V 10A PSU for my [mini belt grinder](https://www.thingiverse.com/thing:5424446) after the cheap laptop-style 5A PSU went pop while I was using it. These switch mode PSUs are easily available and good value for money. You just need enough case to keep fingers away from mains voltage - and that's what this is.

Some design notes:
* The case is designed for a snap-fit IEC connector (Inalways Fused and Switched IEC Inlet Prewired 1.0mm)
* The DC output uses a 2-pin GX20 connector because isn't that just much cooler than a typical barrel jack? (and there's more space to solder decent sized wires)
* The case is held together with 3 x M3 screws
* The PSU is held in place by the screwed-down cover bearing against 2 retainers which rest in the ventilation holes in the PSU case
* The LED is a high brightness blue one - it needs a 1k resistor (but do your own sums for your LED)

####Full Fusion 360 model included to make remi