EDMONTON, Alberta - Under a double draw system used to determine post positions for Saturday's Grade 3, $300,000 Canadian Derby at Northlands Park, trainer John Ross on Wednesday used the first pick to select post 5 for Stylish Citizen, the 8-5 morning-line favorite. Invaders will take most of the action in the 1 3/8-mile race, which is the highlight of the Northlands racing season. A full field of 12 was entered.