3D model of gianfranco
The models were repaired and checked for printability.
This keychain is composed by four indipendent rings, rotating freely one inside the
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other as in a gyroscope. They cannot be separated.
The rings are printed all together and without support.
I scaled down the model by a 0.75 factor.
https://www.youtube.com/channel/UC_QHgR5t29GzLzujpsWeNjg
