Had this idea laying around some time, and decided to make it.
Cant stop playing with it since!
Distance from walls: 0,5mm
(if this doesn't work for you, send me a message and I will make it larger).
Video: https://youtu.be/P9BXWkp0GKs
Print instructions:
2-3 perimeters
no need for infill
2-3 bottom/top layers
0.2mm layer height
The author hasn't provided the model origin yet.