This product was suggested by a sapphire cutter, who told me the Zinc+ as a prepolish and the BA5T for polish was a magic bullet for his Montanas. Basically, it is the DIAZ+, but with the premium BA5T center.
The part most people overlook about the dual band laps is not just the speed at jumping to the polish zone, it is because both operations are done on the same plane, assuring flat-to-flat register on the facet. A lot of people with older loose machines find that it stops “Cheater Chases” and height adjustments. So going from prepolish to polish means no more first-contact leading or trailing edge or heel-or-toe polishing delays.
Made in the 8″ size only. There really is not much sweep room on a two-zoned 6″ lap.