Lion Tamer won the Derby last year for the fellow Cambridge trainers by a wide margin.
Sangster got home by an ever-diminishing head from the luckless Indura, but the job had been done.
The story actually goes back a lot further than this year.
Busuttin: "I came here two years ago with Six O'Clock News for the Lexus and he went no good.
"I sat up there [in the members' stand] and watched the whole programme and believed it was the best day's racing in the world."
At the time Busuttin was preparing a 2-year-old Savabeel gelding for the Ready To Run sale at Karaka.
He and a team of owners paid $19,000 for the youngster who on Saturday picked up the A$900,000 winner's cheque.
"I liked him. He was always going to stay and there is no point in taking a sprinter to Australia.
"I wanted a horse I could take to Derby Day with a chance in the Derby."
Wellington real estate agent Tommy Heptinstall heads the syndicate that races Sangster, who was named after the late Robert Sangster. Heptinstall loves England and all its trimmings.
Tavistock, now standing at Cambridge Stud, carried Heptinstall's same light green jacket with navy blue sleeves and pink cap.
Going to Sydney then to Melbourne for the Derby lead-up races was not the only plan Busuttin copied from Lion Tamer and the Baker stable - both horses were ridden by Hugh Bowman.
It wasn't an easy victory. Sangster was caught three and four wide from the 1600m, but Bowman did not panic and allowed the gelding to relax.
"What a great rider he is," said Busuttin. "He just sat, sat and sat.
"When he took off so did I."
Busuttin admits his encouragement for his horse probably wasn't pretty. "I kicked over a drinks stand when I finally let go inside the 200m."
Unknown to the public there must have been a very awkward moment out on the track for Australian-based South African jockey Glyn Schofield on the favourite Manawanui.
Schofield rode Sangster in Sydney and got off after finishing unplaced in the Gloaming Stakes and said: "This horse needs a spell."
Like everyone else, Busuttin has plenty of respect for Schofield's professionalism.
"But he must have felt pretty ordinary when Manawanui came off the bit soon after rounding the home bend and the horse that sidled up alongside was Sangster," said Busuttin.
For Busuttin the thrill of the victory was somewhat dissipated by the fact Cambridge jockey James McDonald took the Sangster camp before the Melbourne stewards because of an alleged broken contract for him to ride Sangster in the Derby. The team were drawn before stewards before racing on Saturday morning and asked to explain.
The agreement was that all parties would sort out matters without the help of stewards.
McDonald had been replaced after beaten performances in the Championship Stakes in Sydney and a close second in the Norman Robinson Stakes. 'I'm not happy with being drawn before stewards," said Busuttin. "James didn't ride him well and I told him he deserved to be replaced."
The matter was resolved amicably.
"I was always going to look after James financially," said Tom Heptinstall, "and I told the stewards that."
