Refinement benefited from a typically proficient Tony McCoy ride to spring a minor surprise in an eventful renewal of the Dunboyne Castle Hotel & Spa Champion Stayers' Hurdle at Punchestown.
McCoy punched the 16-1 mare into the lead after the final flight and the Jonjo O'Neill-trained runner powered away to record a two-and-a-half-length verdict over 20-1 chance Powerstation.
United claimed third at 16-1, but Brave Inca disappointed on his first attempt at three miles and Mighty Man appeared to go wrong on the run to the penultimate flight.