Nested Telescopic Screws

I made some nested screws for my robot project. The idea is a screw based linear actuator. Making nesting screws is very easy, but making them with catches so they telescope without falling apart is much harder. Even harder still, is making them in a way that can be printed in vase mode, so it's one sturdy shell. This took me a long time with trial and error, but it's done! I hope you enjoy. If you print one, please share photos of your print in the "I made it" section.

Perhaps later, I will post the entire mechanism as well.