Bward seems to have covered most everything, but a couple of additions. The National Junior Santa Gertrudis Heifer Show has a Star Five female show also, which may be part (i.e. an influencing factor) of the increased Star 5 visibility on the junior show circuit. Additionally, Star 5 steers (with one registered Santa Gertrudis parent) are eligible for the National Santa Gertrudis Feedout in Kingsville. I believe that 7/8 Santa Gertrudis animals are now eligible to be deemed purebred so long as they meet the requirements of the breed's Standard of Excellence, though you may want to check on this one--if you're into the show business, that would mean you'd never have a break in showing: 1/2 and 3/4 Santa Gertrudis could show Star 5, and then 7/8 could be back in the purebred show (at some junior shows at least). In short, it's a breed program designed to increase registrations from among commercial cattle, though I believe you have to be an "Active" or "Junior" member of SGBI in order to register animals. Several Santa Gertrudis sales (including the Breeders of the Carolinas Sale and the upcoming Mt. Laurel Classic Sale in GA) now have Star 5 lots in addition to purebred.