Miss Pegasus, For The Ladies and Nuala all established new marks for their age or grade, while Mako Banner was just 0.1sec outside the 2000m 3yr-old mobile record as he breezed to his second career win.
Nuala's time of 2.27.7 equalled the 2yr-old record for either sex set by Kenny The Cowboy in 2003, but it was 1.2sec faster than Black Ice's 2011 time.
The Changeover filly's win also was a tick in the ''canny operators'' box for her trainers Greg and Nina Hope.
They sold the 2yr-old's dam to the United States in 2002 for $100,000 before buying her back after her career finished in 2005 for $5000.
She has already left Delightful Blue (two wins, $23,280) and two other foals, but Greg Hope said Nuala is the best of the lot.
''She's the one most like her mum,'' he said.
''She's just got that little bit of X-factor.''
Nuala is named after Nina's aunt, who lives in Dannevirke.
''She's really keen on the horses. She always backs them, so Nina decided to name it after her.''
Two wins at the trials may have boosted the confidence levels of Miss Pegasus as she trotted to her seventh success in the c2 and faster handicap trot.
Her time of 3.21.3 was 0.6sec faster than the previous 2600m mares' record set by Jasmyn's Gift in September 2006.
For The Ladies sizzled along in the c2 and faster 2600m pace in a time of 3.15.5, breaking Chloe Hanover's August 2001 mark by 1sec.
The Jereme's Jet mare was one of three wins for the country's leading driver, Dexter Dunn, who sat behind Mako Banner for his near-record run in race 9.
Mako Banner's trainer, Graeme Anderson, is reconsidering his original plan to turn out the 3yr-old colt.
''I might just keep working him every second day,'' Anderson said.
Anderson said the full-brother to Mach Banner had grown and filled out in his hind quarters and should continue to get stronger.
Callenberg, another horse bred ''in the purple'', made a winning debut in race 5.
The 4yr-old is a Christian Cullen gelding out of the 2004 New Zealand Standardbred Breeders' Stakes champion Coburg.
He is raced by Terry McDonald of Christchurch - better known as the owner of Terror To Love - and Eddie Griffin of Dunedin.
Callenberg's big frame was a key reason for the late start to his career, but he has thrived at Robert Dunn's Woodend Beach stables, where Dunn's son, John, runs the ship.
''Being such a big horse, the straight-line training helps him anyway,'' John Dunn said.
''He's taken a long time to fill in to his frame and he's still got more growing to do.
Dunn was impressed by Callenberg's cruising speed and expects him to handle the rise in grade.
''He's got such a big motor. We did a fair bit in the running and he still hit the line nice enough so it was a good effort. I might take him to a big track like Nelson for a couple of nice races on those two days [June 6 and 8].''
