RE: Inverted flight, how quick should it fall?
Todd,
As you were told before, adjust all the incidence first! this can be very deceving, second, the airplanes are not always suppose to fly inverted hands off, unless you are flying 3D, and for some manouvers this is bad anyway, fly a loop or reversed cuban 8, if at the exit and you progressibly release up elevator the aircraft pitches up and you have to push, then is tail heavy, this is one of the methods I use, it really works well, as many people try only one manouver, like the inverted 45 dg climb, to me the manouver exit is the most important.
Remember, the CG is also a personal adjustment to your way of flying, try to find the one you are comfortable with.
Hope this helps.