Grab your 70782 Direct Drive Roller (Hobbed Gear) and slide it on to the motor shaft.

Do not line the set screw up with the flat of the motor shaft. The motor shaft flat is short, and the set screw will sit right on the corner of the flat, causing it to pop loose when tightened. Line the set screw up with a curved part of the shaft!

Make sure the curve of the hobbed gear teeth is lined up perfectly with the filament passthrough and the small bearing in the EZR assembly, as pointed out in the photo.

Tighten the set screw using the included 30039 1.5mm Allen Key