Peter Snowden will revert to his original template for two-year-old I'm Not Sure in a bid to snare the colt's first win at Canterbury.

The youngster closed strongly for second to the Gai Waterhouse-trained Guilietta on debut then held his ground to finish fourth to Godolphin's Holler when ridden closer to the speed.

It was a creditable performance but Snowden felt the positive tactics robbed the horse of his finishing sprint.

"I thought his first run was very good. His second start, we sort of pushed him forward a bit and put him up on the speed to give him his chance to win," Snowden said.

"But in hindsight, his trial and his race he ran well in, both times he was able to find his feet early and we rode him from the back.

"We'll endeavour to do that with him on Monday - let him find his legs, don't push him hard early and he does have a great finish when ridden quiet early."

I'm Not Sure tackles the opening race on the Australia Day program and his rivals include Fiveandahalfstar's half sister Ritzy.

Godolphin will aim to keep its momentum with young horses going with Salt Flat, a son of Street Cry who scored a recent barrier trial win.

Snowden also has a strong hand in the Hyland Race Colours Handicap with consistent mare Jitterbug and last-start Kembla Grange winner Olympic Dream.

Jitterbug boasts stronger form lines but Snowden can also make a case for the stablemate.

"Olympic Dream took a little while to win her maiden but I do think she's looking for this sort of trip," he said.

"Jitterbug's been unlucky. She's run a couple of good seconds in town of late and she wasn't beaten far the other day.

"She's been hitting the line quite well both times over 1800 so she gets her chance over 1900 as well."

Snowden also confirmed Paceman, a debut winner in November, was on track to resume in the Silver Slipper at Rosehill on February 21.