Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3043843.

i remixed this to make my preferred changes.
i made 2 different base types

i have 2 shaft types: 1 is solid, and the other allows you to print each shaft section separately, but you will need to print 2 of each section, except the middle piece.

should need no supports, except maybe the center droplet post.