Bought an Echo SRM-230 a while back...my first string trimmer, in fact. It's only a backup now, but I'd like to use it with some of Echo's different attachments, specifically the articulating hedge trimmer. Considering it's not a quick change model, what else do I need to make the attachments work? Or, is it as simple as just pulling off the entire gearbox when I want to change them out? Thanks in advance.