GERALD Mosse stressed as soon as the news broke that he had been sacked as stable jockey to Patrick Biancone that he would not be dwelling on the shock development but trying to ride as many winners as possible before the season ended. He was true to his word at yesterday's Sha Tin trackwork session, riding for a host of different trainers - Neville Begg, Lawrie Fownes, Gary Ng Ting-keung, Wylie Wong and Wong Tang-ping. He did not partner one in serious work for Biancone but was quick to scotch any suggestions of a premature split. ''We were going to work some on the grass but the track was closed due to the rain,'' he explained. ''That is why I was free to ride for other trainers.'' Mosse has been on Begg's Magic Joy for his last couple of pieces of work and yesterday the private purchase griffin went encouragingly to the post in a comfortable 25.4 seconds for his final quarter. He will take plenty of beating in the opener. The great French rider was on Crown Counsel for Lawrie Fownes as stable jockey Darren Gauci partners Sunday Cruise in tomorrow's fourth event. Crown Counsel has been doing plenty of work and has had the benefit of a recent trial. Yesterday he came home pleasingly in 23.5 seconds and is ready to run his best race of the campaign. His stablemate remains a big danger as Sunday Cruise has also stepped up considerably in his work going into this 1,400-metre event. Looking further ahead, Mosse must have been pleased with the feel he got from Wong Tang-ping's improving stayer A Fortune. Last time out A Fortune made good late headway to run fourth to Easy Beat over 1,800 metres at Happy Valley under maximum claiming apprentice Simon ''Hongkong'' Yim. He is in a 2,000-metre event next weekend and is one to keep on the right side of. The farther he goes the better he gets. John Moore's pair Jollity and Action Time impressed in their workout. They were not asked to run time but both appear to be improving individuals. Action Time has benefitted from a change of bit.