Adam Plavsic's nine-medal haul made him the toast of Acton Swimming Club at Wycombe's annual long course Valentine's meet - which drew competitors from 43 clubs from as far afield as Bath, Ipswich and Portsmouth.
Plavsic showing his increasing all-round strength, not only dominated the breaststroke events in the 12-years age group, winning the 50m and 100m races, but also took gold in the 100m freestyle and the 50m backstroke. In the 200m breaststroke, he missed gold by a fingertip but was pleased with an 11-second improvement on his previous long course time.
Other personal bests gave him silver in the 50m and 200m freestyle and bronze in the 200m backstroke and 400m freestyle.
There were strong performances at Wycombe from all the Acton swimmers, which augurs well for the Middlesex County Championships, which start next week.
Tatsuki Kawagishi - with three personal best times - won bronze in the 50m freestyle and in the 50m and 100m butterfly and Ryan
Beresford took bronze in the 50m breaststroke, fifth place in the 100m event and was eighth in the 200m medley.
Joshua Wood, with much improved times, won top eight places in the 50m, 200m and 400m freestyle and Hannah Compton knocked three seconds off her 50m freestyle sprint time but unfortunately missed Sunday's distance events through illness.
In the very strong 12 years age group, Louise Innes came fifth and sixth in the 100m and 200m breaststroke events and Maisie Preston was fifth in the 50m freestyle and sixth in the 100m breaststroke.
For the younger swimmers, a trip to Enfield produced some fine team and individual performances in the second round of the North London graded league, in which Leyton were the clear winners, with Anaconda, Clissold, Brent and Acton all finishing within a few points of each other.
To help out the team depleted by illness, Louise Innes, who had gone along as team photographer, donned her swimsuit and won the 100m breaststroke.
Other winners were Cameron Roker in the 50m freestyle, Helena Phillips in two breaststroke events, Isabel Barnes (butterfly), Adam Aubeelack (freestyle) and Aleksander Dimitrijevic (backstroke).
Louise Walsh swam well in individual events and relays, as did Sorcha Gorman, Martha Trevail, Maggie Innes and Anna Szyszko, who won the freestyle relay.
Second places went to Cameron Roker and Philip Dimitrijevic and to the Dimitrijevic brothers, Elliot Foster and Ieuan Beetham in the freestyle relay.