I find it interesting that others haven't noted the pitch down tendency with rudder application, because I sure have, and it's a commonly known and discussed issue. (At least with the 40.) Mine will tuck tightly towards the belly during attempted knife edge unless I apply a lot of up.

It also shows up dramatically in things like stall turns.

You said that the tendency was reduced with your mods to the horizontal stab. Can you tell me how much you ended up lowering it?
Dennis-