I just keep having a blast with this plane. (Edge540) Very stable and holds her own in windy conditions . Added more throw to elevator for some 3/D flying. Worked great with my triple rates. But all that elev in faster flight can cause some snap during a loop if not expo'd in carefully. Of course when I tried to get her to snap during a loop for my buddies she wouldn't do it. LOL !!!!!
Again,,, this baby point rolls like a pattern ship. Knife edge is easy . I didn't notice any belly pitch or other coupling as long as your trims are centered to start with. Any plane will pitch during a knife when the trims are off.

Just waiting to get the Extra next.