I've found this useful for patients with bilateral hand amputations while healing up and awaiting actual prosthetics. (Pic of an older version in use is shown).
The base uses a locking pin to secure the tool head. Locking pin is held open/closed via magnets.
The tool head has a ball and socket for adjustable positioning. Use with Rubazote style foam rubber to accommodate utensils and styluses etc. Will add more tools in the future.
No supports needed, but some assembly and extra materials needed.
See PDF instructions.
The author marked this model as their own original creation.