Some changes in the early X's and YX's (as listed in BBv6). Some changes in the early S's to reflect the temporal order of release of the Three Canoes design varieties. This also led to the first of two shifts in the numbering scheme. The second shift comes from BBv6 listing S-22.5 becoming S-24. We switched the order of BBv6 S-10 and S-11 (to be S-12 and S-11 respectively) to reflect their purchase/issue dates. The order of BBv6 listings S-23 and S-24 were switched to make them consistent with our current rules for indexing releases.