Gem Faceting Preforming Round Stones On Ultratec V5/V2

In this video I'm showing you my trick for pre-forming round stones, using the Ultratec V5 mast. That will work as well on Ultratec V2, that also has the handle over the spindel, necessary for this technique.

To cut round gems, I usually pre-form the stones manually on CabKing and then use this method to quickly get perfectly round stones, using 360 lap on my faceting machine. I also do it for pavilion cones on rounds, so the faceting goes much faster.