In addition, Leney claimed a bronze in the junior men's under 66kg, while another first timer in Glynn Whittaker took the silver after Leith in junior boys under 24kg.
Antoine Rahier earned two silvers (cadet men's and junior men's under 60kg), while Finn Brown also won bronze in the junior men's under 60kg.
Davies said the Cairns-bound Leney and Rahier have "got a bit of work to do". "It was a good hitout for them for the first competition of the year.
"It was a good sounding board to see where they were at."
Wanganui Judo Club enjoyed similar success with nine medals.
Gold was struck by Aiden Voice (men's 81kg plus), also off to Cairns, as well as Keightley Watson (senior boys 55kg plus).
Voice and Watson also won bronze in the open men's and open senior boy's divisions respectively.
Daniel Watson took silver in the junior men's under 90kg and bronze in the junior men's open.
Brierley Watson finished with silver (junior girls 36kg plus), while bronze came from Arran Gilbertson (senior boys under 40kg) and Sam Pages (36kg plus).
Coach Wayne Watson also singled out rookie Grace Verhoek, who just missed a medal but as an orange belt accounted for blue and brown belt opponents.