"I've been up to see the horse. He's a fantastic individual.
"They put him out into the paddock while I was there and he moved so effortlessly. He's a very athletic horse."
Waller intends to meet with O'Brien at the champion trainer's Ballydoyle training set-up in Ireland to discuss Adelaide's Australian campaign.
"I want to have a chat to Aidan to find out what we need to do to have him ready without over-racing him," Waller said.
Of more immediate concern, hobby trainer Matthew Gilmore heads to Sandown today in search of a first city victory.
Gilmore saddles up Tallat who is chasing a hat-trick of wins in the Schweppes Hcp (1600m). Tallat won a race at a metropolitan meeting held at Mornington in September last year, but Gilmore is not claiming the win as a city success.
"It was half a city win," Gilmore said. "That's the way I'm looking at it."
An electrician by trade, Gilmore has just two horses in work and ventures from his home in Rosedale in Victoria's southeast to Sale, a 30-minute drive, four times a week for trackwork.
It's a task he and his wife Catherine have undertaken for about six years and as a hobby trainer Gilmore says the two horses he has in work are more than enough.
Tallat did his early racing for Darley under the care of Peter Snowden before Gilmore bought the Elusive Quality gelding for $6500 in December 2012.
After two runs he sent the gelding to Ballarat for a wind operation and on resumption, some eight months later, he was successful at Mornington.
While he won on a heavy track at Mornington, the gelding wasn't at home on wet surfaces during the winter months last campaign.
After a couple of moderate runs after a 16-week break, Tallat eventually broke through at Yarra Glen before winning the Ballan Cup at Geelong on November 8.
"It was good to get a country cup, even if it was a small country cup, last time but to win a city race would be great," Gilmore said.