Trainer Oliver Brady was in fine voice after watching Duroob book his ticket to the Galway Festival with victory at Roscommon.
The eight-year-old was sent off a 9-1 shot for the Leo Dolan Memorial Handicap Hurdle after failing to shine at Ballinrobe last time, but jockey Matthew Bowes always looked reasonably confident.
Kicking on three flights from home, Duroob relished every yard of the three-mile trip to pull nine lengths clear of Dream Honours at the line.
"He'll go to Galway definitely, without a doubt," said Brady, who conducted his usual celebrations in the winner's enclosure.
"He is in some form and for the smallest of that field at 15.2 or 3, he fairly beat them well."
The Jim Culloty-trained Regal D'Estruval landed something of a gamble in the opening Athleague Maiden Hurdle.
Backed in from 11-1 to 6s on track, Tom Doyle had built up enough of an advantage to win by an eased-down seven lengths.
Doyle said: "We thought he had a small chance. He had run better each time and we knew the track here would suit him."
Dessie Hughes' First Beauty obliged favourite backers at odds of 6-4 in the Oran Novice Hurdle.
Winning jockey Bryan Cooper said: "When she jumped the last she got her second wind and went on again.
"She's a good filly and she is improving. She won snug enough at the finish."< Waterloo Chateau finished second to this year's Ascot Gold Cup winner Rite Of Passage on his second racecourse start back in 2008 but he has yet to hit those kind of heights.
However, the 9-4 shot proved good enough to claim the Bet On-course With Tote Maiden Hurdle for trainer Noel Meade and jockey Paul Carberry.< Mr Bones (15-8 favourite) followed up Sunday's Bellewstown win with victory under a penalty in the Martinstown Opportunity Handicap Hurdle.
