2A in the pmCO configuration got mapped to 2A in the Polaris configuration. Managed to snag 5A, which was previously occupied in the pmCO configuration, though I suspect it was a couple in 5AB who got moved to 5DG or one of the other paired seats, thus freeing up 5A. FWIW, 5L, which doesn't exist in the pmCO configuration, was also available in the Polaris configuration.