I have successfully combined a set of 4 bar series, in a cartesian chart, with a custom palette, and then clustered the results. chart1 is the result. The custom palette actually has 12 defined colors, but since the there are only 4 bar series, then the chart doesn't leverage the other colors. The second attempt was to create a set of bar series for each of the 12 data points. chart2 is the result. The result leverages the custom palette across all of the data points, but the cluster seems to have some troubles. Is there a way to have the bar use all space, or expand the bar size so that it looks like chart1?