User forum (in French)

As mentioned previously, I found a user forum for the 307 that as of this writing is fairly active. It's on a Web site called Audiofanzine, which from what I've seen covers lots of topics, EM and otherwise.

One potential linguistic issue: It's a French-language site, so you may want to use some sort of translation software. It's easy with Google translator:

Enter this word string into Google:
Forums Roland MC-307 Audiofanzine
Next to the first entry hit [Translate this page]. Voilà, you're there. (I've also posted the French version in the Useful Links at bottom.)

The current list of threads dealing with the 307 is about six pages long. I've posted questions a few times and I usually get answers within a day or so.

Google translator doesn't render the original perfectly, of course, partly because it doesn't recognize simple typos that any native speaker would gloss right over (cest rather than c'est, for example). Nor can you make an entry in another language and expect Google to translate it for you directly -- gotta go elsewhere for that.

But considering the lack of interest in the 307 in the English-speaking world, the Audiofanzine forum is probably your best bet for floating a question to a large number of users.