I designed this part as an addition to @PicklesTheCat 's internal spoolholder (https://www.printables.com/de/model/314528-ratrig-vcore-internal-spool-holder-filament-path)
It has an internal thread and allows you to screw in the PC4-M10 quick connectors. The thread is long enough to screw two of them against each other to prevent the ptfe from moving.
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The author marked this model as their own original creation.