The Division 2 combinations were successful on all three rinks at Rich River, winning comfortably overall by 30 shots - 76-46.
Linda Harris (s), Gary Hulm, Craig Taylor and Gaye Goodwin had the best result of the day, winning 27-13.
Leading 18-10 after 13 ends, they failed to score for the next four ends, with Rich River taking singles to draw within four shots with four ends to play.
However, the final ends saw the Diggers tighten the screws, scoring nine unanswered shots to cruise home.
Mary Anne Spizer (s), Jenny Tonta, Paul Connor and Miro Peterman were struggling early, down 3-12 after eight ends.
They then staged a remarkable comeback, scoring 22 shots to six over the remaining ends for a terrific win - 25-18.
Tony Tonta (s), James Rhook, Chris Frampton and Ian Chessells completed the triple rink victory for the Diggers.
Leading all day, they were never challenged and recorded a solid victory by 10 shots, 24-14.
Playing at Rochester, Division 3 had a tighter battle, winning on one of the two rinks.
The final margin was nine shots, 46-37.
Ron Marchetti (s), Wayne Bradley, Ken Bowden and Allan Hodges led from the front, maintaining a buffer throughout.
Gaining 10 shots to the opposition’s three over the final five ends saw them home comfortably by 13 shots in a solid team effort - 28-15.
Rod Reid (s), Archie Webster, Niels Hilton and John Wilson trailed 12-18 with seven ends to play, but kept things tight as the game concluded.
They picked up their share of shots, not letting the opposition draw away significantly, but Echuca took the rink 22-18.
Both Divisions will now travel to Rich River next Tuesday for preliminary final matches, and a chance to move into the Grand Final.
Division 2 will clash with Echuca while Division 3 will play Elmore.
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