Six weeks ago, punters probably would have had a tough time picking between Sydney Uni and Norths in a hypothetical preliminary final.  Both were in the mix for a spot in the top three and awaiting the return of a number of big names to bolster their already impressive squads.  But Uni and Norths couldn’t have had more different ends to the regular season.  The Students have been brilliant, winning their last six matches, including a 66-17 win over the Shoreman in round 17.  Norths have been anything but. Dropping their last three regular season matches before losing to Warringah in the opening weekend of the finals.  Fortunately, they survived the week one cull, courtesy of an Eastwood win over Easts and will face Sydney Uni at North Sydney Oval on Saturday for a spot in next weekend’s decider.  “We came out of the gates slowly last weekend against Warringah and our discipline was poor early on,” Norths coach Nick Hensley said.  “Our work off the