John, are you familiar with "scripting", either via "010 Editor", or with PythonScript added to Notepad++? You could do some "recursion" with a script that could "step" through your groups and alter them. I'm reasonably certain that Jeff-Groves could do you a script for that rather easily, but he is most likely into the busiest time of the year where he works, and probably doesn't have time to think, much less code something...
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"...and bollocks to the naysayer/s" - Jimbuna
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