System Of Play is now a $4 favourite for the Gr.1 Al Basti Equiworld Dubai New Zealand 2000 Guineas (1600m), rewarding Jamie and Chanel Beatson's investment.
The Ohukia Lodge owners paid A$180,000 for the Ole Kirk colt at last year's Magic Millions Adelaide Yearling Sale.
Te Akau's Sir David Ellis later purchased him for $480,000 at the New Zealand Bloodstock Ready to Run Sale.
Trained by Mark Walker and Sam Bergerson, System Of Play won at Te Rapa before returning with an impressive Ellerslie victory over 1400m.
Beatson said the colt's pedigree and type justified exceeding their original budget, with his family including Group One winners Lotteria and The Inferno.
Another Ready to Run graduate, Justin Case, has won three of five starts for Waikato Stud and Beatson.
The Kris Shailer-trained three-year-old won the Gr.3 Matamata Slipper and Listed Sir Colin Meads Trophy, but is favoured for The NZB Kiwi rather than Riccarton.
Ohukia will also offer a Toronado colt from Makybe Diva's family as Lot 89 at November's sale, alongside Lot 132 by All Too Hard and Lot 453 by The Autumn Sun.