I added version 2.1, more resistant and can be printed without support.
Designed in FreeCAD.
For greater resistance, print the hooks in the position shown in the photos.
* Filament used: Creality Ender PLA+ (Dry the filament before printing.)
* Spare infill density 100%
* Support Type: Normal, Style: Snug
The .3mf files contain support blocking for the rope attachment hole to exclude printing in that area. (I used OrcaSlicer)
Both versions passed the test with a suspended weight of 14Kg, inside the house.
Impact resistance has not been tested.
In the info.txt file there is a link with the rope model.
The author marked this model as their own original creation.