In less than a month, Sir Mako will be eight years old, but trainer Chris Waller believes the best is yet to come from the New Zealand stayer.

Trainer and part-owner Dan O'Leary sent him across the Tasman to try his luck in Sydney and Sir Mako delivered his second win from three starts on Saturday out of his new stable.

Sent out the $4.60 second elect in the 1900m benchmark 95 at Rosehill, Sir Mako was back in the field led by stablemate Beyond Thankful ($16).

With Tim Clark riding hard down the straight, Sir Mako overhauled Beyond Thankful to win by three-quarters of a length with Reigning ($6) giving Waller the trifecta.

O'Leary is also the co-owner of Melbourne and Sydney Cup placegetter Who Shot Thebarman, another former New Zealander also trained by Waller.

"He came to us because of the connection with Who Shot Thebarman," Waller said.

"He had a tendon injury early which kept him off the scene for a long time which is why he has had only 15 starts.

"There is plenty to come from him. He is improving and going through the grades.

"He is also appreciating these tracks which although they are heavy, they are not nearly as heavy as they are in New Zealand."

Waller will make a decision in a couple of days whether Reigning takes his place in Thursday's Grafton Cup.

The stable brought up a double in the two longest races on the program when the favourite Soviet Courage ($3.80) kicked strongly near the end of 2400m to hold off Der Meister ($7.50) by half a length in the More Than Ready benchmark 75.