About this 3D model

Variation of (with much thanks to): 1. Wobble Arrester by twotimes: http://www.thingiverse.com/thing:2151 2. Z-axis floating-nut-arrester by Bophoto: http://www.thingiverse.com/thing:3052 I didn't have a 7mm pin, but I have plenty of 1mm brass rods; hence this simple variation