Colin grabbed a try on Boxing day after coming on for the injured Rory Lamont and the former Hawk starts in the return match.
Colin told the Herald: "We started extremely slowly against Edinburgh and it isn't the first time it has happened this season, so that is one of the areas in which we will be looking to improve when we meet them again.
"The way we fought back showed the talent we have in our side and we might have sneaked it at the end, but a draw was probably a fair result.
"However, I think we have to put points on the board early on Sunday, and we will be aiming to come out all guns blazing because if we can get our supporters behind us, we believe that we have the ability to beat almost anybody at the moment. We were behind in other matches as well [including the Heineken Cup victory against Bath and draw with Montpellier], but there is a real sense of confidence among the boys.
"I'm not sure why we have started slowly in some of these matches, but we have finished them all strongly and the key will be performing to our potential for the whole 80 minutes. This isn't just about the 1872 Cup or the RaboDirect tournament, it is also about guys taking on friends and rivals and you saw the intensity during Monday's fixture.
"We have these big matches every year at this stage of the season, so we know we have to focus on New Year's Day and nothing else matters except being ready for the challenge, because Edinburgh have a lot of good players and they will be aiming to regain the cup.
"Our fans were tremendous at Murrayfield and I'm sure they will turn up in big numbers on Sunday and the fanbase is building all the time. So we have to get them making a lot of noise as early as possible."