Classy gem to make return Commanding Jewel. Leon Corstens admits he is genuinely excited at the return of outstanding mare Commanding Jewel in Saturday's Carlyon Stakes, although the trainer is quick to warn punters not to overestimate the four-year-old. Corstens said Commanding Jewel had worked well in her lead-up to Saturday's Moonee Valley event but was concerned that the 1000 metres may be marginally short. "We've looked at the race and I've got the feeling from gate three she's going to be two to three lengths from the speed and, mind you there's plenty of it, so in that way she'll get some good cover," he said. And from that position I think she'll work herself into the race with 200 or 300 metres to go and that's when she'll be at her peak. So I hope she can get there in time. Commanding Jewel was a high-class three-year-old filly and Corstens is hopeful that those at Moonee Valley on Saturday will see a further-improved mare. The likes of It's Crunch Time and other seasoned sprinters such as Broken, General Truce and Adamantium will be threats as well as the former Hong Kong sprinter Pocket Rockets. Meanwhile, Chris Waller is keeping his spring options open for Australian Oaks heroine Royal Descent but admits she may only have a limited Sydney campaign. The mare is an odds-on favourite to make a winning return in the group 3 Toy Show Quality (1300 metres) at Warwick Farm, her first run since she won the Australian Oaks by 10 lengths. How many starts she has in Sydney after Saturday remains up for discussion with Waller preferring to see how she performs before locking in a plan. Royal Descent holds nominations for both the Cox Plate and Caulfield Cup but Waller is mindful she has no experience racing in the Melbourne direction. We will have a look at things and see if we want to get her down there [to Melbourne] earlier to get her used to it. At some stage we've got to get down there and find out where she's at," he said. Royal Descent competed exclusively in three-year-old fillies company at her only racing preparation. The now four-year-old will step out against more experienced mares in the Toy Show Quality and will have to concede weight to them all. She also has to contend with the outside barrier in the field of 10. "She is fit enough to be competitive," Waller said.