MINETY ambushed Corsham 25-18 on their own Lacock Road ground after a topsy-turvy Dorset & Wilts Division One match.
The home side held the upper hand for much of the encounter, but two lapses in defence cost them dear.
Minety took the lead when James Tweedale fired a penalty close to the home line. From the catch and drive, skipper and hooker Dave Peirce touched down.
Tweedale missed with the conversion but slotted a penalty to make it 8-0.
Corsham regrouped and mounted a sustained spell of pressure.
But a chance went begging when wing Marc Rees stepped out in goal when touching down a try, but they eventually cut the deficit courtesy of two penalties from Denz Brockhurst.
Trailing 8-6 at the break, Corsham snatched the lead for the first time with an easy run-in try for fly-half Rory Auld, coverted by Brockhurst.
The home side, though, failed to tighten their grip and also lost skipper and hooker Tim Russell to a hamstring injury.
As Corsham's defence faltered, Tweedale scampered over from the blindside of a scrum and the scores were level.
Tweedale had a hand, or rather a boot, in Corsham's next try as his miscued cross kick was gathered by Brockhurst, who outsprinted the cover to touch down and regain the lead at 18-13.
The Minety fly-half made amends, however, as he broke through to touch down at the posts and convert for a decisive 20-18 lead.
And Peirce grabbed his second in the closing minutes, despite the hint of a double movement.
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