Ultimaker 2 filament guide

This is a modified version of ppyromann's design. Pully is the same but the center shaft is different. It fits the 608 bearing perfectly. You just need a M3x20 screw and M3 lock nut.

If you need bearings, go to a skate shop & ask. They will prob hand you half a dozen "old" 606 bearings for free!