Internal design of the purge-table done, plus found a better way of simulating likely look - using a F360 Wood appearance - with a photo of the current purge leg imported into the appearance as its texture photo.
For many of the parts it will be possible to alter the height so that top surfaces line up better with the layers with colour changes. This will also mean that the height and width of the table will be easy to alter or grow as more purge-to blocks get created.
As I am keen to print out the whole table - may have to switch around the process - and look for suitable multi colour object to print alongside these parts - in order to get a nice pattern of ‘purge-to’ lines.