Michael,
Before giving up on the idea, it seems the LR re-arrangement has produced good results on this accord. Is it possible for you to make some changes in your aquascape?
My Maroon has a foot-tall rock of very hairy mushrooms he calls home (and almost as wide). Possibly if I were to move his abode, I could add another Clown. (However, to get my hand near those precious mushrooms to move them would upset this Clown immeasurably. Talk about territorial! Though he does not bother any fish who come near, -I- had better not approach them. Interesting.)
Sue