Please excuse my responding to your question also. I do not intend to speak for Mike. I've noted that several people have had excellent results building the wing flat (without dihedral). Of greater concern with regard to the inverted flight characteristics (I would think) would be the fact that both the Senior Telemasters very large wings and substantial horizontal stabilizer are both flat bottomed aerodynamic lifting "wings" in normal flight. It is NOT the kind of combination I would identify with being good at the "inverted flight" you desire to do. A symetrical or sem-symetrical configuration with a slab type stabilizer of some other plane might better fulfill your desires for inverted flight. Not saying that it can't be done BUT ....................Enjoy either way! Maybe some of the experts will weigh in on this question? Best, Blue