“Brad was quietly confident before the race.
“It was a great opportunity for me as a jockey to ride a horse that I knew that was going to be prepared for a race like that.”
The win was a family affair for the Stewarts.
Masterplan is owned by Stewart's mother Pauline.
Western Desert was prepared by Stewart's father Neville.
Neville also previously trained Masterplan before Brad took over the duties in recent months.
McGrath is indentured to Queensland Hall of Fame trainer Pat Duff at Deagon.
Stewart has his small team of gallopers based in the Deagon area, as well.
The revered Duff is in his 80s these days.
A phone call from the great Duff to McGrath following the Stanthorpe win on Saturday hit home for the apprentice hoop.
“He told me that he still remembers his first winner all those years ago when he started training,” McGrath said.
“He told me it is something that Brad will never forget and it is more special when your partner rides that first winner for you.
“It is extra special and it has been great. Brad has been surprised with how many people have called him following it.”
As well as working for Duff at Deagon, McGrath also rides plenty of track work for fellow veteran trainer Barry Baldwin in town.