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

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

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!