ORIGINAL: P-40 DRIVER
Yes, You need dihedral, rudder only, its about 5 degrees. airplanes fly in a fairly narrow set of rules. break the rules and they don't fly properly. reinventing the wheel is a waiste of time, spending the time to understand how a wheel works is well worth the time.
No, I am not having dihedral because I want the wing panels to slide into the fuselage like the Something Extra and similar planes. I will be building ailerons into it.