I'm curious about how the rudder geometry gets set up on a Harry Proa with a single wheel or whipstaff and symmetric rudders. My assumption is that they are setup with the equivalent of a crossed arm joining the two rudders so that if I am turning right, the bow rudder steers the bow to the right and the stern rudder steers the stern to the left, causing the boat to rotate to the right. Anything else I can think of ends up not working when you reverse direction. Assuming I have this right, it leads to a couple of questions/comments:

 - does this make the steering unduly sensitive when going straight, or is it just a matter of getting used to fine movements

 - is there some way to have the geometry between the rudders adjustable? e.g. fixing the forward rudder's angle of attack going upwind and steering with just the aft rudder, or making them work in parallel when docking? or is it not worth it in practice?

Just doing a thought experiment on what it would be like sailing a harry proa on a day to day basis cruising. As an FYI I come from the perspective of having cruised for 4 yrs on a Catana 48 where I knew how to make the boat do exactly as I wanted in tight quarters with the combination of rudders and twin engines. It seems like the Harry Proa might be just as manoeuvrable with an engine on a dinghy sled, a small electric trolling motor and the two rudders, but I'm having trouble picturing it.