Editing Step 13 —

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Screw the heat break into the heater block approximately 4mm.

It does not have anything to seat against yet, so will not be tight.

Screwing the heat break ~4mm deep is very important! The Nozzle should be able to go almost entirely into the heater block before getting stopped by the heat break.

The most critical part of this step is that you get the round cut out in the heat sink running parallel with the heater cartridge, and on the same side as the M3 -.5 x10mm screws (as shown in pic, indicated with two red arrows)

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