Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4972046.

This pre locking mechanism is used when changing the Starlex nozzle and heat break tube in the heat block.

As tolerances are tight within the heat break tube and the nozzle, and due to the specific HBT sealing function, more or less pressure can be applied onto the heat break tube, into the nozzle, leading to a light variation in height of the heat break tube.

This printed part will bring easiness for the pre assembly of the hot end to setup the preferred height.

Check gif on Swiss3Dc.com/stl-parts for mounting procedure.