Hey Mike,
the design has very little to do with Todd`s problem.
tail heavy is tail heavy
once you get too far back it will act nose heavy inverted and dive . thats why I want him to move the c/g forward one inch
inc. has nothing to do with this , the only thing that plays in to this problem could be airfoil thickness,
the thicker the airfoil the worse the effect on diving inverted at an aft c/g location.
I have felt what what Todd is discribing recently with an experiment
so I know his problem well.

As you know there aint much we have not run across helping every one else fix trim problems and working on our own.
The root problem is c/g more nose weight, elevators are more effective around nuetral,,
and tail heavy airplanes ,,, have no controlable effect around nuetral
they are just sensitive,sowe expo it out to make it "feel" good
I just fixed this problem recently Soooo,

Todd you have three ways of doing this ,,,it`s your move
let us know what happens
Bryan