Colgan's only concern came early in the race, but the rest, as he said, was easy.
"She jumped well but kind of baulked, lost a bit of momentum across the junction. I thought I'd have been maybe a spot closer but where I ended up was the next best thing.
"We got a lovely run on the fence and when it came time to get off, I could see Fix ahead of me and I knew she would be the one to follow.
"She felt good all the way, really strong the last bit, but to her credit the other filly didn't make it easy. They're two very good fillies."
Kevin Gray's hopes of further New Zealand Oaks success were boosted at Hastings where High Fashion made a bold classic statement.
The Palmerston North trainer won the Group One feature with the Waikato Stud-bred and owned Legs in 2006 and his hopes are pinned this time on another graduate of the Matamata nursery.
High Fashion was a dominant winner of yesterday's group three Bruce Perry Bloodstock Lowland Stakes with the daughter of O'Reilly ironically accounting for the Chittick family's Chandelier, also by the stud's champion resident sire, as is third placegetter Emerald Queen.
"I think the further they go, the better she will be," Gray said. "She's a very good filly and I'm lucky to have her in my stable."
Winner of the group three Tiger Prawn Desert Gold Stakes at Trentham two runs back, High Fashion was again partnered by former stable apprentice Hayden Tinsley who gave Gray a few anxious moments early in the race.
"I was a little bit worried when she was so far back and that wasn't really the plan but Hayden knows what he's doing," he said.
High Fashion was among the tailenders down the back before making a rapid move across the top to be in contention on straightening. She was driven clear 200 metres from home to win by a couple of lengths.