I can't disagree with that Dick but I have a plane that when the CG is setup to do really good waterfalls, harriers, parachutes, etc. tucks to the belly. As I see it I basically have two choices; move the CG and live with an airplane that doesn't fly the way I want it to under most conditions or leave the CG alone and mix out the belly tuck in the radio which, by the way, also shows up in every attitude when rudder is applied, not just in knife edge flight. Mixing it out is so incredibly easy with no ill effects that I can see I believe I'll stick with it. I know others will see it different but that's my two cents.