Second-season local handler Ricky Yiu has done brilliantly since he received his licence and could be on the scoresheet yet again on Sunday's big San Miguel-sponsored meeting with the improving Rainbow Seeker. The Select Sale graduate has only raced three times, running second first time out and then winning his next two, notably when flooring the odds-on Rising Glory at a remarkable 23-1 over 1,200 metres at Happy Valley last time. Rainbow Seeker has made good progress since then and yesterday morning looked every inch a proper racehorse when working smoothly through 800 metres in 50.9 seconds for apprentice Raymond Tam. The three-pound claimer rode a copybook race on him at the Valley last time and looks set to retain the ride on Sunday when Rainbow Seeker is due to contest a Class Three 1,400-metre contest. Rainbow Seeker could need farther, even up to 1,800 or 2,000 metres to show his full potential, but he looks to have so much class that he could still dominate his rivals this weekend. Yesterday's work should have topped him off as he's not the type who needs to do too much and he is looking really athletic and primed to go and do his job. The Ivan Allan-trained Magic Fingers is going to find it tough at the weights in Sunday's feature event, the San Miguel Silver Tankard, which is the oldest sponsored event on the racing calendar. He is set to carry four pounds more than his correct handicap rating due to the fact that topweight Helene Star has been confirmed as a runner by trainer Patrick Biancone. Helene Star's presence on 137 pounds means the weights will not rise, leaving Magic Fingers to carry the minimum of 113 pounds though his rating, relative to Helene Star's, puts him in on 109 pounds. But one thing is for sure, the New Zealand import is in rude health. He was noted working really well from the barriers yesterday morning under the emerging apprentice Martin Tsang, he looks very bright in his coat and could have more improvement to come. Meanwhile, the low-grade galloper Esteemed was yesterday retired. He was Melbourne and Japan Cup-winning trainer David Hayes' first winner with his first runner as a Hong Kong-based handler when taking the second race of last season.