A word about marking the index gear. Rather than marking the index gear with numbers as is done with most commercial index wheels, Jon marks the index settings with a code of dots that correspond to symmetry. For example, there is one main setting with 5 dots, and the one opposite has 4. The two settings at ninety degrees to that have three dots each. The four settings at the 45 degree angles to those four have two dots each.
Single dots mark the centers of the eight segments left.
This system is actually much faster to use that counting numbers. To cut a sixteen symmetry pavilion, simply cut a facet at each dotted position. Cate has never cut a stone with any other system, and has found the dop markings to be an excellent aid to thinking about the geometry and symmetry of a cut, rather than trying to follow cutting directions by rote. As you can see, this design is mechanically very simple, and emphasizes accuracy and sturdiness rather than bells and whistles. We hope that this installment has given you a good understanding of how this facet head is put together and how it operates.