I designed a drop spiral to work with Alex80it's elevation system (https://www.thingiverse.com/thing:3750276). I had the desire to be able to drop marbles down through the support and have them spat out as I please with some reasonable velocity.

I used Cura tree supports. You might be able to effectively slice and print it in other ways.

Video in action
https://youtu.be/3xIFYIUxtMI

Creality

Ender 3

No

Yes

.12

50%