You want focused, topic specific, cut and dried arranger targeted forums, there are plenty to choose from. This place is a melting pot, a kaffeeklatsch, a place for us to learn and talk about the differences between arrangers, performing styles, views on almost anything. We are still humans, as well as arranger players. More kudos to Nigel for letting this place be what it is.
If I want to learn OS secrets of Yamaha's, there are better places. If I want to find sheet music, or SMF's, or styles, there are better places. If I simply want to chat and natter with a bunch of arranger players from a wide spectrum of tastes and abilities, there is no better...

Still got that good ol' 'Back' button handy!