Belt Holster for Keysmart

A simple holster for a [Keysmart key organizer](http://getkeysmart.com). The particular Keysmart I use has one expansion pack, with fiber washers between each key and between the keys and side plates. This won't fit any other configuration snugly, or at all if it's wider.

The belt loop is 1.5 inches, but will probably be a tight fit with a "normal" leather belt. It was designed to fit on a *very* thin belt.

I don't know how to use Open SCAD, but if somebody does and wants to make this cust