COLTS' B Grade side has finally broken its 2012-13 season drought, defeating Laharum by 56 runs on Saturday.
Anthony Britten, playing in his second match for the season, scored 78 to lead his side to a defendable total of 162.
But it was with the ball that Colts really hit its straps.
Ben Hutchinson claimed a five-wicket haul, while Robbie Taylor and Max English chimed in with two victims each.
Tom Crawford, 4-20, and Anthony Cutter, 3-33, were the best of the Mountain Men bowlers.
Rup-Minyip caused its second upset in as many weeks against neighbours Lubeck-Murtoa.
The 25-run win was the Blue Panthers' second victory against the Mudlarks this season. Vincent White showcased his A Grade talents, top-scoring with 42 and taking 3-18.
Mudlarks opener Graeme Reddie made 64, while young paceman Jesse Hatcher claimed three wickets.
Natimuk-Goroke pair Kent Hair and Clint Robinson destroyed Jung Tigers with a 225-run, third-wicket partnership.
Both batsman reached triple-figures, with Hair getting run out on 123 and Robinson being left unbeaten on 130.
The Tigers were up against it chasing 327 for an unlikely victory, but finished 126 runs short.
Demoted all-rounder Paul Clough pressed his claim for a return to the top grade with an impressive 70.
Quantong defeated Blackheath-Dimboola by seven runs in a nail-biting affair at Kalkee.
The Bulls looked well on track to reel in Quantong's mediocre total of 166 when they were cruising at 3-133.
But just as they did against Horsham Saints before Christmas, the Bombers swung the momentum back in their favour with a Jordan McDonald-inspired fight-back.
Blackheath-Dimboola lost 7-26 including the prized wicket of Oliver Braithwaite for 70. McDonald finished with match-winning figures of 4-24.
Budding quicks Tim Brand and Sam Weddell also took two wickets apiece.
In C Grade action, Blackheath-Dimboola defeated Natimuk-Goroke, top side Homers were too good for Lubeck-Murtoa and Horsham Saints Black edged out Jung Tigers.
Laharum forfeited its match to Horsham Saints Red.