What about the rudder effect of the swept hinged elevon panel? Would not the others swept in opposite direction of turn cancel the rudder effect?I agree, but wonder if you could ge a similar (if less effective) effect by using differential mixing, as this helps reduce adverse yaw as well, i.e. in a left turn instead of as you have described:
Port inner up, Starboard outer down, all others neutral
You would have:
Port inner up large amount, port inner down small amount, starboard outer up large amount, starboard inner down large amount.
Hope the above makes sense, I'll sketch out a diagram soon and post it here.