Manager Derek Adams was delighted to take another top flight scalp as Ross County knocked St Mirren out of the Co-operative Insurance Cup.Two shoot-out penalty saves from Michael McGovern booked the Staggies' place in the third round after the game finished 3-3 after 120 minutes. [LNB]"It was a marvellous performance," said Adams, who reached last season's Scottish Cup final with County. [LNB]"They're a group of players who never cease to surprise me." [LNB]Hibernian and Celtic were humbled by the First Division side from Dingwall on their way to Hampden last May, where they lost out to Dundee United. [LNB]However, Adams believes Wednesday's display eclipsed those efforts in terms of his side's all-round play. [LNB]"This is the best performance that we've ever had, and it overcomes anything from last season," he enthused. [LNB]"The way they fought, the way they passed the ball and created chances - they never knew when they were beaten."[LNB] It's a long journey, a long night, and to go away empty handed is difficult to take Danny LennonSt Mirren manager A thrilling tussle in Dingwall saw St Mirren take the lead against the run of play on 44 minutes when Darren McGregor nodded in the opener from Paul McGowan's corner. [LNB]Parity was restored on 69 minutes when man-of-the-match Michael Gardyne twisted the Saints defence inside-out before unleashing a shot from left corner of the box. [LNB]County moved ahead on 78 minutes. Lee Mair fouled Martin Scott to concede a free-kick 25 yards out, and County skipper Richard Brittain - formerly of St Mirren - produced a pin-point finish into the top right-hand corner. [LNB]But the home side's joy was short-lived as less than 60 seconds later as Michael Higdon sweetly volleyed St Mirren's equaliser from just inside the penalty area. [LNB]Extra-time started in explosive fashion as Jure Travner provided the cross for Paul McGowan to score on 92 minutes, but two minutes later Mark Corcoran's shot across the St Mirren goal was prodded home by County sub Steven Craig. [LNB]And successful spot-kicks from Brittain, Gardyne, Iain Vigurs and Paul Lawson, allied to McGovern's two saves, sealed their win. [LNB]St Mirren manager Danny Lennon said: "It's a long journey, a long night, and to go away empty handed is difficult to take. [LNB]"We got ourselves into a very good position just before half-time, but what was disappointing was that every time we attacked I felt we looked vulnerable on the counter. [LNB]"We were in two very good positions coming back, we got a good reaction after County's second goal and at the start of extra-time, but we didn't hold on very long. [LNB]"Take nothing away from County, they played some very entertaining football, they stretched us in the wider areas, had a bit of quality and they break quickly."