Thanks Max! This has put me on the right track (I think). I haven't had time to test it yet, but I can see the logic in the equation.
One other question; Instead of starting in column B of the TOC, couldn't I place the formula in A3 and change the friendly name to match A3 in Sheet 1 (e.g. "1.01"). The friendly name is what is visible to the casual user correct?
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