Torrential rain played havoc with yesterday's intended Sha Tin grass barrier trial session but not before a number of griffins had underlined their potential. Four trials had been scheduled for the straight 1,000-metre chute but only one and a bit took place. The Tony Millard-trained International Sale purchase Just In Time was up on the speed throughout before pulling 1.5 lengths clear of the Brian Kan-trained two-year-old Merry Merry in the only trial run. Just In Time had been working well prior to yesterday's trial and clearly has a future as does Kan's Merry Merry who went much better yesterday. He had been slowly away and didn't really finish off his trial on the dirt last week. Before that Merry Merry, a son of Snippets, had appeared to work really well for a two-year-old and he's another almost certain to be winning races for his record-breaking mentor. Of the rest in this griffins trial, it is likely to pay to keep on the right side of David Oughton's Buck's Fizz and the Peter Ho-trained Jade Ruyi. Yesterday they finished fifth and sixth to Just In Time, having been mid-division throughout the trial. Buck's Fizz is a New Zealand-bred two-year-old son of Kaapstad and everything about him, albeit at this very early stage, points to him being a real galloping type. There's a bit of depth about the way he has moved in what work he's done and he might just develop into a useful sort. Jade Ruyi is a three-year-old colt by the staying sire Ela-Mana-Mou who has been great value for money over the past few seasons. His prowess as a sire was only really recognised at the recent sales in Europe when his progeny took off in price. He is usually a profound influence for stamina yet Jade Ruyi has looked pretty precious and is an interesting prospect given his breeding and the speed he's showing on the gallops. The bit of a trial saw Ivan Allan's Chairman's Prize prospect Fairy King Prawn come home 2.5 lengths to the good of stablemate Crystal Charm, who is returning from a knee-chip operation, with Fast Win another four lengths back in third and last. Fairy King Prawn will be starting for the first time for Allan on Sunday and appears to be on good terms with himself, though Allan hasn't done too much fast work with him. In other work yesterday, Kan's stable star Industrialist completed a fast 1,200 metres in 1:16.8 showing he's come out of his Queen Elizabeth II Cup heroics in fine fettle. Kan's Master Fay was another to catch the eye. He came through 1,200 metres in 1:20.1 and, as they say, gelding him could well have made a man of him. His mind seems to be much more focused. Tony Cruz is leaving nothing to chance in his quest for his first training title, to add to the eight he won as a jockey and apprentice. Yesterday his pair Bon La Vie and Explosive galloped 1,200 metres in 1:18.9 with Bon La Vie appearing to be on the upgrade and looking for a mile or more.