You jest. The cake comment was just in relation to a suggestion from Warren Platts that I use Newton's law of gravity and a spreadsheet to make a table of the relative effects of all planets on the position of the centre of mass to see how significant earth and Venus are compared to the outer planets. Such a table would inform but not affect the findings I have presented, and does face the rather tricky three body problem in spades. I was simply hoping that some cooperative soul might have ready access to this data and could point me towards it. The mathematics of SSB calculation were a concern of Sir Isaac Newton. His work using planets out to Saturn has since been refined with the discovery of the outer gas giants. It should be easy to find a table listing the relative contributions of all the planets to the SSB movement pattern. Such a table is somewhat incidental here. Analysing the dynamics of the planetary contributions would extend the cyclic decomposition of the available SSB data, but there is more than enough to research the existing JPL dataset which integrates all planetary contributions to the distance between the sun and the centre of mass.