Solidoodle 2 M3 Z-Axis Nut Holder

M3 nut holder for Solidoodle M3 Z-axis rod hack. See http://www.soliforum.com/post/127928/#p127928 for more background on the mod. It didn't appear that anyone had yet posted a Thing for the 3mm nut hugger so I cooked this up based on http://www.thingiverse.com/thing:159671 (amazing thank you!). I projected the geometry and adapted for smaller m3 nut vs 5/16". I only printed the one part. My tolerances were a little tight so I heated an m3 nut with a lighter and pressed it in. I insert two nuts