I want to third the request for plans. I'll take them as is.
As far as the yaw thing goes, I was really more curious if the engines could do it more than if there was a way to add a yaw control. I think if I built this model, it would not be one I would test the idea on. Too pretty and too much work. Maybe a small .061 version that is simpler and less time invested in building.
OK, so tell me where to send the check for the plans please.