Thank you for the advice,
I’m looking for an easy build sports plane, which can do a little more. So it’s not for competition. But I like to fly 4 point rolls, slow-rolls and knife-edge, to learn to use the rudder better.
I was thinking to modify the design a little, a symmetrical airfoil for the stab and increase the side area by adding a turtle deck or something like that. Maybe something like the Sig cougar. I’m not sure yet.
I intend to build the 60 size with a OS 61FS.
That it needs some “steering” to keep it on track in knife edge is not so bad (I’m used to it with my other planes), my concern is the side area and the efficiency of the rudder to keep the plane at level and not going down.
I’m going to build it from a plan so I can choose the wood.