I’m not claiming my solution is the best. It is what I came up with to ‘overcome’ the serialized problem and I’m happy it works.
I have to look deeper into your solution. It does seem interesting. And I have to admit, I miscalculated. I counted all fields in a group instead of just the checkboxes, which is only 2 or 3…. so that would mean a significant difference in amount of rows.
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