Two points in 2018, 17 in 2017.
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They're the margins Clarence have beaten North Launceston by at Bellerive Oval in the past two seasons.
The two-time reigning premiers have won at every other ground during that time, and coach Taylor Whitford believes contested ball is the key to breaking the Roos' two-year stranglehold.
"They've seemed to match up well against us the last couple of years," Whitford said.
"They match up well inside the contest with Gabi Chambers and Brady Jones in really good form and they've got a good ruckman in [Ryan] Bailey.
"Whoever seemingly won that contested footy was able to get field position and win the game - they've been able to do that the last couple of times up there, we've been able to do it up here.
"It's nothing to do with the ground in particular, it's more that match-up that they've had the edge on us down there."
The Northern Bombers welcome two young guns back from the NAB League for the trip South, with Jack Lanham dropping out and Lachlan Cocker failing to recover from a concussion on debut.
"They'll get three or four Devils players back this week, as will we with Rhyan Mansell and Ben Simpson," Whitford said.
"The talent within their youth has been well known, [Clarence coach Jeromey Webberley] has said it all along, their younger guys have got really good talent and they've seemed to turn over their list to build that up ... we're going to have to be prepared.
"Lachy Cocker won't play with his concussion last week - unfortunately for Lach he played a really good first half and would have kept his spot, but we're not going to take the risk with the head knock and concussion."