You think you are an addict?? Welcome to the club. I have been doing it for 47 years, not all successfully, and have over 30 airplanes, about 2/3 of which are park/yard fliers, hanging in the garage and a handful in the workshop in the basement. When I moved into the present new house I have an open field across the street for 2 years. I took advantage of it. There are houses there now but the trees are all newly planted so the streets are wide and usuable for flying. I just make sure the motors are the GWS with rubber spinners just in case.

On the rudder. If you give left rudder with an airplane that has normal yaw roll coupling, similar to a shoulder wing airplane, it gives a left roll. The tip of the rudder gives a right aileron effect.

Your configuration is nearly neutral until you give rudder deflection. I would expect to not get any roll from the lower part of the rudder and right roll from the top of the rudder. Life is usually more complex than that so the above is just a educated (I hope) guess.