Rotating rings fidget toy - FreeCAD parametric

I found the rotating rings fidget very satisfying when I scaled it up to 150%. Then I figured simple scaling could affected the gap making the toy too loose. So I decided to make a FreeCAD version for everyone to find their preferred dimensions while keeping the functionality the same. Also original radii are substituted with chamfers to prevent overhanging issues.

All the variables meant to be changed are in the VarSet. Number of rings may be changed in FreeCad by hiding unwanted rings.

• Air gap (0.2mm default, stricter than original)
• Rings thickness (7.5mm default, like original)
• Rings number (up to 9 rings)
• Center sphere radius (15mm default, like original)
• Limiting angle (applies chamfer to center sphere to limit overhangs)
• Total height (default 25mm like original, note the permitted values are limited to center sphere diameter)
• Chamfers on rings are regulated using “Chamfer angle” and “Chamfer height” variables

Note “original” means the 150% scaled version of the model that was remixed.

FreeCAD file is done with version 1.0

.3mf file is included for easiness of use. Main changes to the standard profile are the seam position to set at random to prevent possibly blocking seams, and infill Top and Bottom fill patterns to be set to Concentric, which is only a minor aesthetic change.
Infill is at a relatively large value (40%) because added weight seemed more satisfying to me.
In its default form, and printing only 4 rings as in the original file, this ends up being a 14 hours print for about 100 grams of material.

thanks to the original designer RarelyEvil (on thingiverse) and Marvin that remixed the model publishing it on Printables.