By Dave Di Somma, Harness News Desk Mo’unga has sealed his place in the IRT New Zealand Trotting Cup with an impressive win in the Allied Security Maurice Holmes Vase at Addington Raceway tonight. The Regan Todd-trained star bided his time early as favourite Franco Marek headed to the front only for driver Robbie Close to unleash late and overhaul the leader, who held on for second ahead of American Me and defending champion Dalton Shard. It was an outstanding effort from Mo’unga, who had started off 10 metres. The…