Hi
Quite the project you have going there. We call boats like that Riggers over here. As in out rigger. Since the boat will pivot at the rear of the sponsens to turn, I suppose the below hull rudder will work .I have not before seen this done. Since the rudder is centered and the prop shaft needs to be in the center too, how are you going to do that? I think your 45mm prop is too big for the motor. n.h.schmidt