DISAPPOINTMENT turned to delight for KGV schoolboy Jason Kang yesterday as he scooped top honours in the San Miguel Tournament at Fanling. Kang, 15, was among almost 100 players whose names were put on the reserve list when the full complement of 414 places had been filled for what is one of the world's largest one-day golf events. Two days ago, however, the Hong Kong-born son of Korean parents received notice that he would, after all, be able to compete. And Kang, the leading local player in the Hong Kong Open Junior Championship a fortnight ago, made the most of his late reprieve with a 78 over the Royal Hong Kong Golf Club's par-70 New Course. That gave the 13-handicapper a net score of 65 and victory on a count-back from policeman Tong To-fuk, playing off 15. ''I was lucky to be playing and I certainly didn't expect to win,'' said Kang, a junior member at Discovery Bay. In the category for the best gross score, victory went to former Hong Kong Open amateur champion Michael Grant, with a 72 made up of one birdie, 14 pars and three bogeys. Asian Golfer reporter Simon Wilson fired a 73 to pip John Ball and Jack McCoull on a count-back for runners-up spot. The winner of the men's Stableford event was Yung Kwok-ping who amassed 47 points - 11 shots better than his 20-handicap. Leung Hok-ling, who finished his round in darkness, was second with 41 points. Recent Hong Kong arrival Ann Lavender, playing off a handicap of 31, was victorious in the women's Stableford competition on the New Course. Her tally of 46 points was two better than Eva Poxon's.