Extended Extruder Carriage with 8mm Rod Clamp (Printrbot Simple Add-On)

This is the front extruder carriage for Jon Lawrence's 300mm No sag Y extension for the printrbot Simple 2013-2014 http://www.thingiverse.com/thing:242185

This version has a clamp that attaches to the upper 8mm pole and then using a m3 nut and bolt, it will clamp onto the 8mm rod, locking it in place.

updated 11/22/2014

Upper_Pole_clamp2.stl is an updated version with a wider gap to the upper pole clamp. Allows Tighter clamp and can be tightened down the line. I suggest a washer up top