Glasgow Warriors head coach Gregor Townsend knows there is room for improvement after his side's 21-17 win over Edinburgh at Murrayfield saw them claim the 1872 Cup for a fourth successive season.
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Glasgow were 16-3 ahead at half-time, but Roddy Grant's 59th minute converted try and another from Tim Visser - his 48th in the RaboDirect PRO12, to equal Tommy Bowe's all-time record - drew the hosts within four points. But Townsend's men held firm to triumph.
"The pulse rate did go up," said Townsend, referring to the final quarter of the match.
"Edinburgh certainly got the momentum in that last period, but I know we've got a very good defence.
"To get three tries was great and to get the win and retain the cup was excellent.
"We know we're not the finished article. We've got a lot to work on: one is playing for 80 minutes, another is our discipline, which has got to improve.
"It's a continual process. We know we have to kick on now."
The 1872 Cup is awarded to the aggregate winner of the derby double header and the Warriors won the first contest 23-14 at Scotstoun following a fast start - before repeating the first-half onslaught in the capital.
Glasgow had nine fingers on the trophy and the RaboDirect PRO12 points almost sewn up after 40 minutes, with tries from New Zealand-born, Scottish-qualified wing Sean Maitland and Ruaridh Jackson, plus two penalties from Peter Horne, who was also sin-binned.
Glasgow dominated up front and the win would have been more comprehensive had a Dougie Hall score not been curiously ruled out and had Stuart Hogg not dropped a ball over the try-line.
"We were disappointed we didn't get the fourth try," Townsend said.
"There was one that was disallowed which would've been a cracking try; I'd love to work out why that was disallowed.
"Hoggy was walking in there on that offload after great work from DTH (van der Merwe)."
Watching interim Scotland head coach Scott Johnson will have been warmed by Glasgow's display with the RBS 6 Nations in mind.
Former Sale Sharks forwards coach Stevie Scott was present alongside Johnson - the ex-Scotland hooker has been linked with the interim forwards coach position - and will have been purring at the Glasgow display, with Townsend signalling out tighthead Moray Low and hooker Hall for their performances.
Until the final 20 minutes, the Scotland players in Edinburgh's ranks did little to enhance their reputations with places at stake for the Calcutta Cup opener with England at Twickenham on February 2.
Edinburgh head coach Michael Bradley said: "Ridiculously we could've won the match, if we'd scored a try in the last minute, which would've been the greatest steal of all time.
"We got two tries in the match, but the key point for us is we were at home with 11,500 people, we needed to put Glasgow under pressure, but we ended up releasing the pressure.
"It's an easier game than we are currently playing, how we seem to be putting ourselves under pressure. We have a lot of work to do in that area.
"There's no question the boys have the ability to play rugby and when we get it right we can be very good and when we control the position with pressure we can be excellent.
"But we're not anywhere near that at the moment."