@MarvinP/et al: there's nothing wrong with you providing a worked example of your solution, be it a formula or code. The gist of the thread is that if the OP simply posts a workbook with little or no description, and then the "expert" replies with ONLY a workbook with no words, formula, code or description of the solution provided, it makes the thread of little value to the wider community.

If a sample workbook is provided, I will often update it and upload it. If none is provided, but the thread has piqued my interest, I will sometimes produce a sample workbook to demonstrate the solution. However, more often than not, I will include the code, or formula, in the answering post. Belt and braces. Everyone happy ... happy'ish.

Regards, TMS