3. A system according to claim 2 , further comprising: a determination module to determine whether the unplaced spine group and the most similar placed unique spine group overlap.
3. A system according to claim 2 , further comprising: a determination module to determine whether the unplaced spine group and the most similar placed unique spine group overlap. 4. A system according to claim 3 , further comprising: a translation module to translate each of the unplaced spine group and the most similar placed unique spine group outwards from the center ring when overlapping until the unplaced spine group and the most similar placed unique spine group no longer overlap.