Lower Ballinderry showjumper Luke Campbell battled it out with Strabane's Jonathan Smyth to claim the Greenvale Transport 1.35m Mini Grand Prix at Portmore, Aghalee.
The victory, on Derryinver Truffle, owned by Lurgan farmer Davy Campbell, was even sweeter since the rider had worked hard to upgrade the eight-year-old for Grand Prix events.
Truffle is from a family of great jumpers, bred in Portadown by Tom and Linda Magee by the Swedish stallion Tournesch out of their Cruising mare Icing.
"I am absolutely thrilled to win at Portmore where Truffle has been competing from his novice days," explained Campbell.
"It was a strong event with 39 starters and I knew Truffle would have a Grand Prix win soon because he has put in great performances all season."
Thirteen riders jumped clear over Rafael Suarez's track, with Luke jumping into the lead on 34.35, closely followed by Jonathan Smyth on Cafre Olympic Dream, another eight year-old owned by James McKean.
Sean Monaghan with Lisban Aladdin, owned by Crumlin's Linda Courtney, finished third in 35.08 ahead of Smyth on the Armagh owned and bred Premier Spirit (7) from the Dominic Rice yard.
Richie Moloney, Kilkenny and Merqusio excelled to win the $100,000 two-star Grand Prix in Aiken, South Carolina, while Louth's Nicky Galligan and Javas Miss Jordan claimed the $30,000 Equifit Grand Prix at Thermal, California from 89 starters.