Polypropylene, hands down. Most plastic thingies that’re meant to bend constantly without wearing out are PP. Like those little straw caps attached to big drink tumblers? The bendy part, if not the whole hinge, is usually PP i think. I think generally things that could be described as “living hinges”.

I will say though, that it’s easily the most difficult filament I’ve ever had the displeasure of printing. It absolutely REFUSES to stick to literally anything but other polypropylene lol. What you do is just put some packing tape on your bed, that stuff’s made of PP as well.

If I had that amount for a printer, I’d get an LDO Delta Flyer kit or an LDO BabyBelt Pro kit. Maybe even 2! They’re pretty cheap last i checked

We built a fancy solar node with a big giant antenna and put it on top the local library, but something’s not working with it… Still trying to get it right. It seems like there are plenty of nodes around, if we can just get it working

This, 100%