The stand for this very good set of adjustable dumbbels needs a replacement of the plastic parts if you have the new version of the dumbbels (the 2022 version with 2kg increments). Design is very precise and will firmly lock the dumbbells to the stand.
4 left and 4 right blocks are needed (just mirror print the provided STL file). Mine were printed in Prusa PLA Black Jet with 0.4mm nozzle, and 30% infill (grid layout). The model already includes an easy-to-remove support, and does not require additional printing supports.
The author hasn't provided the model origin yet.