THE enigmatic Partner looked primed to run a big race in tomorrow's seventh event when completing his trackwork preparations at Sha Tin yesterday. Partner has proved a most frustrating individual since winning on his second start as a griffin, failing to supplement that success and throwing in some costly failures for his supporters. But he looks just the type of horse with which Stephen Leung works wonders. In his first season Leung conjured wins from a number of similar problem horses and his training methods appear to be working the oracle with Partner who will be starting for the first time for Leung tomorrow. And it has become legend in local racing that stable changes can so often bring about an improvement in form. Yesterday Partner looked on good terms with himself as he came through 400 metres in a smooth 23.5 seconds under Basil Marcus. This work enforced impressions gleaned from a recent trial when Partner ran home a very strong winner and in jockey Basil Marcus he looks to have the ideal kind of rider as the triple champion habitually takes charge of his mounts. He puts them into the race and doesn't let them shirk the issue. Each race has a competitive feel to it tomorrow which will make the early betting exchanges both interesting and fraught with danger. Caution should be the byword at this embryonic stage of the season with many more betting opportunities to come. Derek Cruz's Aurora Spirit has also been working very well for the seventh and he, like Partner, now looks nicely handicapped down in Class Five. Aurora Spirit finished off his preparation with a thorough hitout from the barriers on Thursday morning, holding a definite edge over his higher rated stablemate, Blue And Gold, in the process. David Hill's Toy World will be on many shortlists for the seventh, too, due to a very promising run as a griffin at the end of last season. He may be good enough but he is not yet fully wound up and, whatever he achieves, he will improve for the run. The opening event has seen very good work from John Moore's Magnum Thirtythree who is also blinkered for the first time and looks likely to leave last season's form way behind this time round. It is possible that he works well and does live up to it on racedays but at this stage of his career, it is worth giving him the benefit of the doubt. Patrick Biancone's Famous Arch is a blot on the handicap for the third on form from a couple of seasons back now that he has plummeted into Class Six. He has also trialled and worked well. Ivan Allan's Many Treasure has also done plenty of work for this along while Lawrie Fownes' Noble Regent went better in a trial compared to last season. Four horses stand out for the fourth on their work. These are trial winners Lucky Express and Jollity plus Sea Of Jasper and Vitality who also caught the eye going well in their trials. There was very good work yesterday from Leung's Charming Talker who should go close in the Kwangtung Cup.