"She's a high-class filly. I like her, I think she's a Stakes horse."
The Sandown win followed a debut fifth placing in the VOBIS Gold Strike (1000m) at Warrnambool during the May Carnival, when her chances were cruelled by a slow start, and McDonald said that gap between the first and second starts had been good for Miss Ole.
"She had four weeks from her first start to her second run, so I think it's nice timing," he said.
"It's got a good feel to it, I've got momentum with her and she should be right."
Saturday's meeting continues the build-up to the July 5 Finals Day card with heats for several other events to be conducted.
There is no Winter Championship heat, but the TAB / ATA Trainers' Trust Handicap (1100m) is a heat of the Creswick Series for three-year-olds, while heats of the Mahogany Series and Silver Bowl will also be conducted for that age group.