About this 3D model

Here's to all of us that have the Printrbot Simple with the XL Tower / Build Volume Tower Upgrade. Where the filament goes to the left and slips off the extruder bearing... This solves the problem by forcing the filament to the right. Also I found that the printrbot bearings were too far offset for my other spools so I created a simple rectangle to hold the two bearing holders from Small Spoolholder by JohnSL (http://www.thingiverse.com/thing:93652) This filament guide is mounted using the same allen screws from the Simple kit (you should have some extra) with drilling a 5/64" hole. The dimensions of the mount hole are: 5.9mm countersink diameter with 3.75mm countersink depth. The inner hole is 3.75mm to clear the screw threads. This is oversized a bit to accomidate shrinkage from your printer. Good luck!