I forgot to mention that my Canards have always had two rudders. I use the Knife Edge maneuver to decide on when a CG adjustment is needed. Once, when I was more adventurous, I move the CG back further and further in order to be able to do a loop while in Knife edge. I had reached the 50% loop level, but I wanted to go all the way. The next thing I knew, while the plane was at least 4 mistakes high, the Canard went into an inverted flat spin and I was unable to recover it. It was just too tail heavy.