We went a little crazy and put the L-BL4 rim on the L-BL3 cup. What we came up with was the Loco! The Loco has a semi-flat, very soft rim with some undercut for chop room. The cup is shallow (similar to Bach E). The throat is a slightly tight #28, which creates higher efficiency when combined with the low cup-volume. The Legends S backbore increases endurance and range. Slotting is excellent with this model. This mouthpiece has everything you need for playing solo and lead, or when you want to play ‘crazy high’!