The Irish team finished 2nd behind Great Britain, but later lost this placing after Macken was charged with a technical violation regarding doping tests by the FEI. In 2010, 61-year-old Macken rode the Argentinian Warmblood Macuco to win one of the opening classes during the CSI "North American" competition at Spruce Meadows. A documentary of Macken and Boomerang's partnership was produced and released by the BBC in 1982.