Customizer Keyring 'Boton Charro'

This is a replica of an ancient jewel, very popular and typical in the folklore of the region of Salamanca (Spain). Some people believes in its magic properties, and says it transports good luck... Its origins aren't well known. Some people says it is related to cowboys, other people says its related to some dark ancient wars or even darker beginings... But easy design in OpenSCAD, so I made a customizer to allow you to choose some of the properties and sizes of the typical keyring trying to ma