Giant Haystacks leaves rivals on the canvas Fourth on handicap debut at Navan before finishing second when odd-on for a Clonmel maiden, Giant Haystacks (15/2) relished going an extra half-mile at Leopardstown to land the Mercedes Benz South Dublin Handicap Hurdle under Tom Harney.  Never that far off the pace, the son of Elusive Pimpernel led before the omitted final flight and was driven out to beat Cave Court by a length and a half.  Trainer Ross O'Sullivan said: “We all had gloomy faces after being beaten in Clonmel the last day but it’s all worked out for the best.  “He’s a nice horse and came recommended from Aubrey McMahon and Aidan Fitzgerald. “ "All the lads (Keep It Simple Syndicate) are from Clane and are a great bunch of lads and they will have great crack in Clane tonight!” Quotes from Alan Magee