An unusual plan paid big dividends for the connections of Ammirati (NZ) (Savabeel) when the big gelding confirmed New Zealand Derby plans with a dominant victory in the Listed Trackside Gingernuts Salver (2100m) at Ellerslie on Sunday. With more than a month between his win in the Gr. 3 Wellington Stakes (1600m) at Otaki in late November and a fifth placing in last week’s Gr. 2 Levin Classic (1400m) at Trentham, trainer Stephen Marsh decided on an eight-day back up for Ammirati’s first middle-distance test. That proved a masterstroke as…