The selection of clones (different types of vines within one sort of variety) is central to viticultural success. Stephen Cass of the Cass Winery discusses his use of ENTAV certified clones as well as their relevance to Brix levels. Along the way, Steve describes the relationship of Brix to alcohol levels in wine. Filmed at Feast, Gold Coast in Chicago. www.feastrestaurant.com. Askawinemaker is a production of Candid Wines. www.candidwines.com