with I.S.S. mounts, better hardware and 4 more finishes. The Prestige Session and Session came with 5.5" deep SensiTone Steel snare drum, while the Prestige Session Select came with 6.5" deep SensiTone Steel snare drum. In 1999, they were replaced by the all maple SMX and birch SBX. World Series (WLX/WX) - The World Series was introduced in 1986. They were placed between the Export and DX/DLX kits, and the only differences were tom arms (Worlds came with the TH-80 Tom Holders, whereas the higher series had TH-90 tom holders), and the DX/DLX had super hoops (V1). In 1987, World series replaced DX/DLX series. Shells were 8 ply shells - 2 inner plies were linden, 5 plies mahogany, and 1 outer ply birch. Later shells (from 1989) were 7-ply birch/mahogany. They came in both wrapped (Performance World WX 6500) and lacquered (Prestige World WLX 6500) models. Eventually in 1990 after running side by side with the SLX (Pretige Session Elite) the World Series was renamed the Prestige (WLX) and Performance (WX) Session Series. These 2 models shared the exact same shells the differences being the snare drum, 1 colour option and the SLX had the high tension lugs. Jazz series, the Prestige Session Jazz retained the WLX designation. Custom Z - Drums made from maple (CZX) or birch (SZX), 8ply (10mm) snares and rack toms, 10ply (12.5mm) floor toms and kick drums. The CZX was introduced in 1989, and discontinued in 1994. Initially, in 1989, the only finish available was #300 Champagne lacquer, however, by 1993, the last year of production, #110 Sequoia Red, #113 Sheer Blue, #103 Piano Black, and #109 Arctic White were also available. Toms were available in square sizes (12x12, 13x13, etc.) and power sizes (12x10, 13x11, etc.). Bass drums were available in 16" and 18" depths. All featured high-tension lug casings with brass swivel nuts. In the final year of production, some CZX kits were offered with "virgin" shells (no BT2 tom mounts or BB3 bass drum mounts). In 1991, the CZX Studio Series, also known as the SZX, was introduced. The SZX featured 100% birch shells in the same thickness as the CZX. Tom sizes, however, were limited to power sizes and bass drums were only available in 16" depth. The SZX was available in #131 Midnight Quartz, #133 Crimson Quartz #110 Sequoia Red, #113 Sheer Blue, #103 Piano Black, and #109 Arctic White.