I've got a lot of flights on the Phaeton 90 and 1 or 2 degrees negative on top and zero on bottom and stab will give you a very nice flying bipe. Even before I changed the incidence (the plans don't show any incidence, which to me, means zero) it was still as stable as could be, it just flew with a definite nose up attitude.
Believe me, you don't have to worry about this plane. There's NOTHING hairy about it. I trained my son to fly with it when he was twelve years old. It's strictly a creampuff even as heavy as mine was with a 4 pound gasser up front.
Great flying bipe.
I crashed mine eventually when it went dead , low, slow and inverted. I couldn't pull out in time.