UPSETTERS - DOUBLE SEVEN Vinyl LPDouble Seven, released by Trojan in late 1973, was the last album Lee Scratch Perry would release on the label for some considerable time, and it was essentially the final album project he put together before establishing his own Black Ark studio. Opening track Kentucky Skank sets the tone with a slow creeper whose frying sounds underscore its role as a praise song to the Colonels KFC recipes; the cosmic Moog blips come courtesy of Ken Elliott at