Port Adelaide players improve their on-field mental strength Port Adelaide midfielder Hamish Hartlett gets a handpass away from West Coast's Andrew Gaff. PORT Adelaide midfielder Hamish Hartlett has found another key change at Alberton - the Power players can think their way out of trouble. While much is appropriately made of the new fitness base the Port squad has from Darren Burgess's program, Hartlett recognises new coach Ken Hinkley has also opened the players' minds. The proof is in how they once again reacted when facing a blow-out loss by fighting back from a 41-point deficit in the third term to beat West Coast at AAMI Stadium on Saturday night. The Eagles' tactics in the first half confirmed AFL rivals are now respecting the unbeaten Power by studying Hinkley's running game - and plotting to block it. "The really pleasing thing for us is we changed our gameplan at half-time, did something we have not done before and we got a great result in the second half." said Hartlett of Port's reaction to West Coast's shutdown tactics. It shows if things are not going the way you want them to, we know we can change and respond. We've added another string to our bow, to our gameplan in how we move the ball. If we find ourselves in that position again, we won't have to wait until half-time to go to that Plan B. Port on Saturday plays North Melbourne, a team that contrasts the Power this season for grabbing defeat from the jaws of victory. "North Melbourne are in good form, so if we give them that sort of start we might not have an opportunity to catch them," Hartlett said. Our slow starts are a huge focus for us this week; Ken's already touched on it (in Monday's review meeting). We can't afford to keep giving up these slow starts. It will be a huge emphasis for us this week. We know North Melbourne having come so close to Hawthorn at the weekend will be desperate to get a win and the way they are playing they don't deserve to be 1-4. Port has twice this season created miraculous comebacks - against Adelaide when 31 points down in the third term of Showdown XXXIV and against the Eagles - but Hartlett says the Power cannot ignore what put his team in trouble. "We want focus on how we improve," he said. We have some deficiencies to work on this week. You don't want to go through each week focusing purely on the positives. That's why we know we have a long way to go to match the very top teams. Port's selection meetings change in tone this week with Hinkley and his crew needing to deal with the loss of key defender Jackson Trengove for at least the next six weeks with a fracture in his right foot. The expectation is the Power will seek Cam O'Shea and Tom Jonas to take the Kangaroos' tall forward options with Port's most-experienced defender Alipate Carlile.