VAL DI SOLE - Among the stars of world cross-country racing on the final day of the UCI Mountain Bike World Championships was Valentina Corvi from Valtellina, who won gold in the Women's U23 category. The twenty-one-year-old from Tirano's success follows her Team Relay win and Filippo Gilardino's bronze in the Junior Downhill category. The young Italian rider put together a top-notch race from the very first lap, immediately setting her pace and opening up a gap behind her. Lap after lap, Corvi pulled away with authority, leaving no room for any qualified competition. Only Switzerland's Hutter…