I kept your replies on my growing to-do list but I'm realising now that I'm won't be able to "dive" into the matter again.

Thanks for your help, I'm closing the case now.

> Rolf, I blame you for the sleep I lost over this!

And thanks for taking care of my insomnia. ;-p

Honestly, while the use case is very exotic I learned a lot about the various corners of the regex features. I hope for you too!

Der Weg war das Ziel! :)