Their efforts helped push St Clair into third overall at the three-day IRB event on 47 points, comfortably ahead of fourth-placed Waimarama (Hawke's Bay) and just behind Christchurch's Sumner.
There was clear daylight behind winners East End from Taranaki, who collected 107 points over the carnival, helped by the performance of world champions Andrew Cronin and James Morwood, who won three of the four premier races and also grabbed the teams race title for good measure.
Their only blemish was a second-placing behind Sumner's Blair Quane and Simon Williams in the assembly rescue, although Cronin wasn't too disheartened by that.
"We've never managed to win all five races - last year we won all four premier races but only got second in the teams race - but it was nice for Sumner to get the win," Cronin said. "They had one of their life members pass away yesterday and it was great they could pick up a premier win and dedicate it to him."
Sumner's departed life member was long-time IRB stalwart Murray Lord, whose favorite event just happened to be the assembly race. Around 60 crews staged a drive-past in his memory before competition began today, while senior crew Steven Parrat and George Thomas completed their own special gesture by winning the overall crown in their division.
The under-21 division proved the most competitive, with the four titles being shared between Papamoa (assembly rescue), Mount Maunganui (mass rescue), East End (single rescue) and Pauanui, who won Friday's tube rescue.
It was the East End crew of Jared Gray and Scott Nelson that displayed the greater consistency, however, taking out the overall honours.
Next year's IRB championships will be held at the other end of the country, at Northland's Waipu Cove.