I'm looking to make a pie chart centered on another larger pie chart; where
the smaller pie will show data summarized by metacategories, and the thinner
slices protruding from behind in the larger pie chart show more detail- sub
categories of the metacategories.

I haven't been able to figure out a way to do this yet- the closest I got
was to create a column chart with 2 series, then change each one to a pie
chart and expand one slightly. This is close to the effect I want, but
sizing it to look right is a nightmare because it keeps autosizing based on
how close the exploded pieces are, and probably other factors I don't know
about.

Anyone created anything like this before, and if so, any tips on how to make
it work so I can make it a custom chart and use it for other charting as
well?

TIA,
Keith

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