Wingatui trainer Steven Anderton said a few days in the paddock following the mare's sixth in the group 1 Otaki weight-for-age classic on February 22 had agreed with The Diamond One.
''She enjoyed it,'' he said.
''She freshened up nicely, so everything seems on track anyway for Saturday.
''I haven't done a lot of work with her. She's only done a couple of three-quarter pace [hit-outs] and a run along.''
Anderton did not feel the need to work the daughter of Tale Of The Cat too hard after she came back slightly underweight after the rigours of a long journey back from the North Island.
''She did lighten up a wee bit after the trip. She has put a wee bit back on and I'm happy where she's at anyway.''
Plenty has fallen into place for The Diamond One tomorrow. The conditions of the race mean the five-race winner gives just 1kg to the lowest-rated horse, Something Zed, who has won just two races.
Add in a cosy barrier draw of two and it is no surprise Anderton said jockey Terry Moseley, who rode her to a last-to-first win at Wingatui on Boxing Day, was rather confident.
''It's a good draw. I'm hoping there will be a wee bit of pace on, and she should be up there thereabouts and not too far off the pace anyway.''
Anderton said a combination of a muddling pace and inexperience meant The Diamond One did not produce her best in the group 1 at Otaki.
''It was a stop-start affair, but I think also I firmly believe she's six months off having a go at those horses.''
Anderton has plenty of respect for The Diamond One's rivals tomorrow, particularly Arietta who was unlucky running ninth in the Cuddle Stakes at Trentham last week.
''She's a very nice mare, and a horse I've always liked is Emerald Queen. She doesn't help herself much but I think she's a decent sort of horse.''
Arietta will carry 55.5kg, 0.5kg less than The Diamond One, while Emerald Queen will join the rest of the field on 55kg.
Tomorrow could be The Diamond One's last appearance for several months after her six runs this season have produced four wins and $97,000 in stakes for her owners and breeders, the Dennis brothers of Woodlands.
''We'll talk to the Dennis boys and see how she goes and we'll talk after that,'' Anderton said.
Another Anderton-trained star could be off to the paddock after tomorrow, but she will decide her own destiny.
The Glitzy One tackles a tidy field in the $25,000 Hororata Gold Cup after returning from her northern campaign in January and February.
''Really for her, she's got to go good to carry on with her this season. We'll get a better line on her on Saturday.''
The big ask for the Flying Spur mare is the wide barrier draw of 14, leaving jockey Shankar Muniandy with few options when the field jumps from the 1800m mark.
''It's not the flashest, so he's going to have to try and organise something from there.''
