There’s been screw bikes well before this, not sure if I can link to the proof here.

I have no idea where I am supposed to look at on this thumbnail. Clearly they need more red arrows, four just isn’t enough

I’d just like to complain that when you need this many identical parts, you should really use molding of some kind. That was a lot of 3D printer hours.

(Hopefully it’s fine to necro this a bit)

Edit: Very cool though!