Gary Willis' mastery of the fretless can be heard on recordings by Tribal Tech, Wayne Shorter, Allan Holdsworth, and his own solo recordings. His no-frills fretless 5-string has just the right features to facilitate his remarkable tonal and dynamic control. Basswood body. 3-piece maple neck. Ebonol fretless fingerboard. SFR-GWB Custom neck pickup and a Custom 2-band EQ.