However, now he seems more locked into the Ellerslie classic, provided the exceptional filly progresses well.
The $22,500 late fee to nominate for the Derby is not due until February 28.
"Obviously, we wouldn't be paying that until we were certain she's come through this race well and is in good order."
James says he's getting a lot of assistance from Silent Achiever, who has suddenly burst into the headlines with a claim as possibly the country's best 3-year-old.
"She's so easy to train. She helps you all along the way."
The way Silent Achiever has sprinted hard and quickly from towards the back of the field to win the 2000m Championship Stakes at Ellerslie and the 2000m Waikato Guineas, it's difficult to imagine what can get in her way this time.
Those sprints have been electric.
The TAB showed what it thought of tomorrow's contest when it had Silent Achiever lonely on top of the market at $1.60. Shuka was second favourite on $5.50, then Carrick at $7.50 and the remainder at any old price.
With the aid of the No 1 barrier, Shuka deserves some consideration.
The former South Islander was only a fraction more than half a length from Silent Achiever at the finish of the Championship Stakes at Ellerslie on January 1 and had to cover a bit of extra ground when third to her at Te Rapa last week.
That was Shuka's first start in five weeks and he will understandably be sharper this time.
Guess What is under the radar so far, but he has gradually improved with each of his six career starts.
He had a pretty good run behind the leaders in the Waikato Guineas and fought strongly for fourth. He has drawn well and can get some of this.
Carrick is improving and there was a lot to like about Mr Chez's narrow defeat by an older horse under 58.5kg at Te Rapa last week.