Positubes! (Single, Multi, and Assembly, plus Experimental versions!)

My wonderful Patreon supporters get this model free! :) Could we make a non-squishy form of the squishy tubes that are everywhere in the modern world, I wondered? And then print it in flexible filament anyway and make it squishy! There are a bunch of different files here, and the best thing to do is to go read the original writeup on Patreon here: https://www.patreon.com/posts/positubes-single-70869706