Here is a 6in f/5 travel truss dob kit by my friend :

https://www.printables.com/model/1325533-smallest-telescope-...

Wallace, my 6” f/2.8 :

https://www.printables.com/model/997327-wallace-6-f28-telesc...

And my tiny but mighty 3” f/4 : https://www.printables.com/model/1475113-76300-pocket-dobson

Wallace is built, but Gromit, a 16.5” F/3, is under progress. Working on the mirror and CAD :)