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I have a 2500+ I need to unlock it but the L1 bridges are all closed already. I believe this is a Barton core but not sure. All L9 bridges are cut, L3 is intact, L12 B1 is cut, L12 B1 is cut, L5 B2,3,4 are cut. L2, L6, L8 are intact, L11 B4 is cut. Does anybody know the unlocks?