Rush and Brock had also won the May race, but were disqualified for going outside the buoyed course on a Sunday where there were a lot of floating logs to avoid.
Runnersup for the second race in a row were Whanganui Kayaking Club's husband-and-wife mixed masters team of Robyn and Brian Scott, with their 29m 56s time being 83.18 per cent of prognostic.
In a family twist, Trevor Rush got to finish well ahead of his own daughters Steph and Jacs Rush in their MCW2x, while Robyn Scott beat her children Cambell and Erica Tanner - a New Zealand age group representative - who were racing with different partners in their own craft.
Erica Tanner will be off to Belarus to compete for New Zealand in July.
"The old hands were showing the young hands the way it's done," said Jacs Rush.
Third was M1X competitor Tristan Gregory-Hunt of the Star club in Wellington, finishing in 26m 7s, which was 82.82 per cent.
Next race of the Winter Series is July 10.
