When adding ailerons to an airplane intended for rudder control then it will be neccessary to reduce the dihedral substancially. If you do not the ailerons will be very unresponsive.


On an airplane of about that size typically will have around five or more degrees dihedral for reasonable control on rudder and cutting this in half will give a reasonable response with aileron Which in most case will turn out to be about scale dihedral.