Those with 12 faults or less came back for the second round where five-time winner Laurie went clear on her 2014 Olympic Cup champ Dunstan Springfield. Beatson and his 20-year-old star My Gollywog, who won the cup in 2013, picked up just a single time fault, to finish on nine faults from the two rounds.
Hay also went clear but had a single time fault, to sit on one, while Laurie and her youngster Dunstan Breeze went clear to sit on eight, and McNaught-McFarlane had a rail at the second to finish on four.
The quietly spoken Hay was rapt.
"This has been our target for the show," she said. "It is just incredible, I can't believe it.
"Centavos has a fantastic temperament and gives 100 per cent every time he goes out."
Hay also won the Leading Rider of the Show.
It was the first time Brougham has won the overall dressage title, but she has been third three times.
This is Vom Feinsten's first year at top level. Next month she heads to Australia with today's runners-up Penny Castle (Ashhurst) and Magnus Spero, to compete at the Sydney CDI.
"I am thrilled," said Brougham. "I have found my superstar in this horse. I really believe in him and his brilliance, but you really have to put the complete package together.
"He really has been foot-perfect over the past two days."
The results - both the title and the musical freestyle mark - were a huge confidence booster for Brougham, who praised her fellow competitors.
"Everyone needs someone there to push you along."