"I thought we were in trouble and again when they came at him in the straight but [McNab] knew what he was doing."
Even when the swoopers challenged with 300m to go, McNab waited to ask Pier for the ultimate effort and he delivered to take his record to three wins from four starts.
The win was the biggest of Weatherley's training career, made even more special by the fact he now trains with his daughter Briar while his son Sam, on a riding suspension, also played a huge part in Pier's preparation.
Also buzzing would have been part-owner Ozzie Kheir, whose colours had won the A$300,000 Queen's Cup at Flemington aboard Soulcombe just minutes earlier.
While McNab's ugly ride to win the Guineas was a thing of beauty, visiting Australian jockey Josh Parr ran him close for ride of the day with a rails-hugging special to win the Metropolitan on Campionessa.
Having his first day riding in New Zealand, Parr produced a gem to get the Mark Walker-trained mare home from last in the main lead-up race to next Saturday's New Zealand Cup.
The other feature of the day was won by the "Lisas", with jockey Allpress and trainer Latta combining to win the $80,000 Pegasus Stakes with Lincoln's Kruz.