Recently I moved to another flat. It's really cozy and all but also rather tiny, so I had to adapt by shrinking my living room workbench, which also includes ditching a space-consuming chair. A simple stool that fits under the table must do.

So instead of buying such a thing for 2€ at IKEA, I once again decided to go the most inefficient route by building one from scratch.

Inspiration this time came from Venedict Yerofeyevs hallucinatory odyssey “Moscow-Petushki”. It's a story about a drunk madman attempting to take the train to reach his beloved one waiting for him in a sleepy town named Petushki. Ever since I read it I wanted to try some hyperboloid design. What? Why? Where's the connection? …you might ask in utter confusion. I'll elaborate: Petushki is home to one of the last remnants of Vladimir Grigoryevitch Shukhovs original creations: the hyperboloid (https://en.wikipedia.org/wiki/Hyperboloid); it's just a scaffold for a modest water tower in this particular town, yet his invention over time has culminated into a blueprint for all kind of gigantic structures such as radio towers, cooling towers and …towers (those on airports). Or - like in this case - a barely less impressive stool.

So where was I… right: 

In order to build one yourself you only need 8x 500mm pieces of squared timber (22mm each side) which comes at around 12€ from the hardware store. There sure is a cheaper option than fancy larch wood which I used here. Apart from that you need a fair lot of filament and especially the ring in the center has to take a substantial amount of load; so make sure to use thick walls and a high infill rate. I printed with 35% cubic infill, 4 walls at 0,8mm each and 3 top/bottom layers at 0,6mm height. A first attempt with only 2 walls and 25% (and a flatter design) resulted in a crack rather immediately. Material used was about 800g of PET from recycled plastic bottles (not including the failed attempt). Would it work with PLA? Hard to tell…

You'll also need 16pc of wood screws, something in the range of 3x30mm.