This one is one of the best designs for cuban links locks very sturdy and already produced and working pretty good. 3 Parts Model
All Messurments in Pictures
This for links size of 10mm
Stones information:
1.2mm round stones in total 111
Metal Weights: 14K - 11.8grs 10K - 10.5grs
15mm Cuban Lock: https://www.cgtrader.com/3d-print-models/jewelry/necklaces/15mm-cuban-links-or-bracelet-locks
17mm Cuban Lock: https://www.cgtrader.com/3d-print-models/jewelry/brooches/17mm-cuban-link-lock-large-version-3-parts
23mm Cuban Lock: https://www.cgtrader.com/3d-print-models/jewelry/brooches/23mm-full-stones-cuban-links-lock-3d-print-model
More of my models at: www.cgtrader.com/ferocar