Another point I'd like to make is that the point of a forum is to organize the available expertise on the site. So having to put things in a different forum - like the enlarging one - might work but your post might not be seen by an expert on macro with enlarger lenses who doesn't hang out in the BW enlarging area. Having a particular forum would make sure that if there's someone who might help, the post would definitely come to his attention.

-A