Printrbot Simple Metal - Filament guides for Aluminium Handle

UPDATE: While this seemed to work great at first, after a few days worth of use the friction seems to be increasing so I've switched back to just using zip tie loops again. I'm not sure how to rework this short of using a teflon tubing insert or something like that. For now if you plan on printing consider yourself warned.

My first attempt at filament guide that would work with the Aluminum handle wound up restricting my Z height by about 15mm so I set about redesigning them. I've now made t