Rocket Win, a poorly-performed galloper from the stable of Ricky Yiu Poon-fie, showed an amazing turnaround in form to win the first of two barrier trials at Sha Tin yesterday after sprinting hard in the home straight. Rocket Win has raced five times and boasts an average beaten margin of 16.8 lengths. In fact, he's only beaten five horses to the line in that handful of starts. But yesterday, wearing a set of pacifiers, it was a transformed Rocket Win who trialled over 1,050 metres on the all-weather track. Jockey Eddie Lai Wai-ming took his time settling the gelding down in sixth place before taking him to the outside to produce his finishing burst. Rocket Win simply blew straight past his rivals at the 200m and maintained a three-quarter length advantage over the hard-ridden Class Two performer Tiger Ridge when they hit the line. American-bred Rocket Win arrived in Hong Kong late last year after a short career in England, in which he raced five times for trainer Brian Meehan. He was slow to find his feet but progressed to win a two-year-old handicap over a mile at Newmarket on good-to-firm ground in September when ridden by Frankie Dettori. Britain's Racing Post credited Rocket Win with a 96 rating for that win, and the official handicappers basically agreed, giving him an international rating of 95 when he was exported. Hong Kong's senior handicapper, Ciaran Kennelly, having seen too many British horses languish unsuccessfully high up the ratings when they arrive here, discounted that rating by 20 points the day he walked off the plane, and it was reduced a further 12 points during the summer recess to enable him to tumble into Class Four. The system cannot do much more for Rocket Win - it's now up to him. But sprinting home the way he did here, breaking 34.5 seconds for his final 600m and clocking 11.54 for his ultimate 200m, suggests his owners' patience has not been totally in vain. Tiger Ridge looked above himself in condition but was subjected to very hard riding by apprentice Alex Lai Hoi-wing to achieve his placing. Much more impressive was the John Size-trained Alinsky, who led effortlessly under Douglas Whyte and remained strongly on the bridle down the home stretch. Victory Treasure, a disappointment at Sha Tin last time when hanging inwards, raced truly in blinkers for Corey Brown and came home a relatively-untested fourth. Class Five galloper Wisdom Express, from the Tony Millard yard, won the second heat easily with Chris Munce on board. Wisdom Express was kept up to his task to score by 31/2 lengths from stablemate Sevens Heaven, who was given a hard trial by Brett Prebble after a slow getaway. Happy Sunday (raced 47), a Danehill three-year-old trained by Almond Lee Yee-tat, ran a nice third under a quiet ride from Gerald Mosse after being on the speed throughout. At the other end of the field Noble Boss, who missed the start hopelessly at Sha Tin last time, repeated the performance under barrier trials conditions and was at least eight lengths behind the second-last horse when he finally consented to leave the gates. ONES TO FOLLOW: Rocket Win, Alinsky, Victory Treasure, Happy Sunday.