Filment guide pulley for Wanhao Duplicator i3/Monoprice Maker Select v2.1

I decided to move the spool holder on my Monoprice Maker Select down onto the control box, but wasn't happy with the filament routing into the extruder - it kept snagging on my Z braces, or rubbing on the top of the frame. Hence, this little pulley get-up was born!

This mounts with the existing M5 holes atop the frame. Filament can be routed a few different ways through depending on where you have it sitting. I printed with 50% tetrahedral infill at .2 layer height in PETG with zero issues.