Kumitachi, of course! Duh. I've mostly done those at seminars with my teachers teacher and I'm not as familiar with them yet. I'm trying to build up a weapons repertoire for myself, our empty hand syllabus is I find very consistent and clear but with bokken and jo what I know is more random. Maybe it's time to start concentrating on the kumitachi next, that's a good idea.
Thanks for the link Peter, I don't know these guys but they're actually not that far away from me.