A strengthened version of the pastamatic drive screw. The part has been split into two parts, the cone/spiral joint and the part with the ¼ inch hexagonal drive slot. The hexagonal section has also been elongated so that a longer drive shaft will engage fully. By making this a separate part it can be printed with 100% infill or whatever value is desired. In combination these features make the part far stronger around the hexagonal hole and so less likely to fail.
Apologies for the interesting colour scheme, it used the remainder of several different reels of filament.
Wrong version was uploaded with gear teeth too shallow. New version has original gear teeth profile restored. Thank you to moeknews for pointing this out.