My plane only had an adjustable stab with a one-piece wing bolted in and when I first flew it, it needed heaps of up elevator trim and flew horrible knife edges as well as the OP's plane. I can't tell you what the incidence's were factory supplied. Winding in heaps of negative on the stab, I was able to get the elevator trim to neutral and the knife edge flight was far improved. I probably should measure what it currently is one day.
I'd never build a pattern ship without an adjustable wing for a few personal reasons. I guess the biggest reason (in my mind) is that you have a engine, fuse, wing and stab and if you adjust the stab to get the wing to fly at a different angle, you've also changed the angle of the motor, the height of motor thrust line (and wing/stab vertical positions), and angle of the fuse as well. Changing the angle of the stab just seems a really messy way of changing the incidence.