I'm taking advantage of the Project-based workflow, please use bambustudio and the Fullproject.3mf file to have the assembly/explosion view and all the plates in one file :)

In case you need to, the other .3mf files are compatible with prusa slicer but not cura (for some reason it says the project is empty, if someone has any tips to make the 3mf files more universally compatible, let me know!)

Printing details

Printer: A1 mini with AMS
Filament: Cheapest PETG I could find (TECOR purple and sakura pink)

Walls: 5 for extra strength for the links
Infill: 8% on the legs and 5% on the big rock to keep things light
Supports: The underside of the big rock and each link start (see .3mf file for already done)

number of plates (A1 mini): 3 plates
Total Print time: around 40 hours total
 

Assembly details

Note: If you are using Bambustudio, please make use of the assembly view and exploded view for extra clarity while assembling (the fullproject .3mf file)

I designed it to be assembled by heating the little protruding pegs with a butane lighter, then you just push the two parts together and they will bond very well (tested only in PETG). to minimise the separating line, make sure to test the fit a couple of times before and to heat the pegs really well → You need the molten pegs to stay molten for a couple of seconds while you push the parts into place fully.