Mike
Just found this thread.

Whatever you decide, try to avoid the wing and stab on the same vertical plane. This will cause the stab to hunt. Think about the airfoil making dirty wind at the rear of the wing, This turbulance will flow a somewhat straight path toward the tail, therefore turbulated air hitting the stab. Hence the tail always hunting.

I did this back in the late 90's on pattern design of mine. Made for a great highspeed s plane. Locked in!! Slow it down, to make it pretty, and the tail lost its lock in. . Later moved the stab 1" above the previous location and the plane became a great performer in any attitude or speed.
I think it was all associated to the stab getting somewhat undisturbed air accross it.