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Open the extruder_idler

Insert a piece of 1.75 mm filament through the extruder_body into the PFTE tube.

Using the Bondtech set screw, carefully center the filament on the drive teeth.

Tighten the set screw. Don't tighten too much as you will damage the thread.

Remove the filament.

This is a good moment to put a dab of lithium based grease on the gears. Make sure to only put grease on the gears, not the drive teeth!

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