By Rachel Bachman Perkins and Gavin Kentch After a successful opening weekend of SuperTour racing in Duluth, Minnesota, athletes, coaches, and techs made the short trek down to Birkieland for three days of racing out of the Birkie Trailhead in Cable, Wisconsin. APU skiers Rosie Frankowski and Tyler Kornfield came into Friday morning as the points leaders for the early-season SuperTour races. By Sunday afternoon, the leaders were, unofficially, Alayna Sonnesyn of SMS and Zak...