Charlie...
You could of said it in single line, a quote from your post:

"BIAB doesn't seem fitted to be a mixing seminar forum for me"

I feel that you probably did not understand the concept that I proposed.

I proposed a thread where people who want help would ask for it, based on specific audio.
(Mixing or non mixing issues)

If I am filling the tune with some 70%-80% content from BIAB, I think I can ask people who are familiar with that content. People who mixed with that content!

Thanks.