Brushed Sparky Motor Mount

Here is the 8.5 mm motor mount I printed for [BrushedSparky](http://buildandcrash.blogspot.com/2015/02/brushedsparky-sparky2-microquads.html). The SCAD file is customizable for mount size and tilt. It prints in groups of four because the arms on BrushedSparky are tilted by 12 degrees.

Version 0.21 has a slightly thicker wall that is works with Brushed Sparky v0.2