Sounds like the perfect approach to me. This way posts are more likely to be lodged in the pertinent community rather than people favouring a more general one because that community doesn't have the clout to support great content.

It's not a big community yet, but I wonder if the right encouragement will get people posting more, so I will probably try to contact you re the @HomeEdders community. Is there a specific channel which is best to use our should I contact you or someone else directly, Acid?