This is a replacement shaft for a Scotts spreader. The original shaft rotted out, so I made a replacement. The two shafts fit together to make up the whole shaft. Align the hex ends and drive teeth, add a bit of super glue and tap together with a hammer.

Prusa

I3 MK3S

Doesn't Matter

No

I printed the shafts vertically with no supports, only adding a brim. The shafts are 209 mm long which just fit within the maximum height (210 mm) of my printer.