Handheld drill-operated cement mixer.
Threaded rod M12 - length depends on the user preferences (400-600mm approx)
Self-locking nut M12 x2
Steel washer 12mm x1
Usage video: https://www.youtube.com/watch?v=vVGtkoRlkWQ
I used nozzle diameter 0.8mm, to reduce printing time. 5 shells for perimeter with inside-out direction.
It went relatively well without supports but I am not sure it would work on any printer. Perhaps supports may be needed for lower nozzle diameter.
Model diameter 160mm, height 120mm
1st version of the mixer