Most trainers would be content to have claimed one of the country's most prestigious Group One races with a well-bred stallion prospect.

Chris Waller is not most trainers.

Waller is preparing for the return of Doncaster Mile winner Sacred Falls in Saturday's Tramway Stakes (1400m) at Randwick armed with a fresh approach to the horse's preparation.

Undefeated in five New Zealand starts, Sacred Falls came to Waller earlier this year with a big reputation.

But he was outpointed at his first three local runs and it appeared he was a grade or two below Sydney's best three-year-olds.

Then he came out and won the Doncaster Mile.

Waller has put Sacred Falls' early autumn lull down to inadequate fitness and he has attempted to fix that this time with a slow build-up and three barrier trials.

"I thought he was a bit fat last preparation which is why it took a while for Australia to see the best of him," Waller said.

"He's a really good horse. He is a nice horse to work with and a genuine horse."

Leith Innes, who has ridden Sacred Falls in eight of his 10 starts, has again travelled over from New Zealand for the Tramway mount.

The scratching of Norzita due to a tendon injury which has ruled her out of the spring has taken some gloss off the race but it still shapes as arguably the most intriguing on Saturday's Randwick program.

The Waller-trained Royal Descent holds favouritism at $4.60 after finishing second to stablemate Hidden Kisses in the Toy Show Quality first-up.

Waller says she will strip fitter but he is taking a long-term view as she heads towards the Caulfield Cup.

"She just blew out last time," Waller said.

"She's looking for further but it's a nice race for her."

Waller will also saddle up stable stalwart Shoot Out who the trainer concedes is "pretty soft" for his first-up run.

"We don't punch them into fitness, we just let them get themselves there," Waller said.

"But that just can mean they are vulnerable first-up."

Norzita's scratching means first emergency Scream Machine has gained a start.