Customizable MPCNC mount for round tools

This is a customizable tool holder written in OpenSCAD to attach round tools to the [Mostly Printed CNC machine (MPCNC) ver 525](http://www.thingiverse.com/thing:724999). **It has not yet been tested** because I ended up finding [a Thingiverse mount for my exact tool](http://www.thingiverse.com/thing:1645698) (a crappy Harbor Freight cutout tool). It's designed to make multiple holders for a single tool that has varying diameter across its length (such as the aforementioned Harbor Freight piece