Waller said the last thing he would do would be to take Winx to the races underdone, and now she was an older, stronger mare, she needed more work.
Winx latest win sees her become just the second horse to win three successive Cox Plates, a feat previously achieved by the legendary Kingston Town.
Folkswood (25-1) finished third.
Registering her third success in the weight-for-age championship of her home country, Winx made it Gr1 win number 15 and extended her unbeaten sequence to 22.
She deserves it, says the man who rode "The King" to the first of his Cox Plate victories.
Winx settled about six lengths off the lead as Humidor improved a few positions to settle on her heels on the inside, and Blake Shinn aboard Humidor kept the great mare in his sights as Winx began to edge closer approaching the short straight. The Melbourne Cup, a two-mile handicap at Flemington Racecourse on November 7, is that nation's most popular race.
"I was born the year Kingston Town won his first Cox Plate and to think she's emulated the great-trying to compare one horse to another, they're all different animals at the end of the day".
"We are in the presence of greatness", an emotional Bowman said after the race.
The second-placed horse Humidor who put in a very courageous effort is part-owned by former All Black Mark Carter, and his brother Mark and sister Rachel.
"Trying to compare one horse to another is hard, they're all different, but we are in the presence of greatness". Winx has won five races since returning from a four-month break in mid-August.
"We're unequalled because we own the best mare in the world and the only one to win three Cox Plates", he said.