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Editing Step 27 —

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Using your printer's control software (or LCD screen), set both hotend's temperature to 285°C.

Allow them to reach 285°C and wait one minute to allow all components to equalise in temperature.

Gently tighten both nozzles whilst holding their heater blocks in place with a spanner. Use a smaller 7mm spanner to tighten the nozzle.

You want to aim for 3Nm of torque on the hot nozzle—this is about as much pressure as you can apply with one finger on a small spanner.