Just a quick note, static rigging angles don't stay "static" much in the air.

You have a rotating prop and wing in front of the horizontal stabiliser so just because the motor is -1.5, the wing is +0.5 and the stab is set to zero doesn't mean that's the angle of attack each is seeing in the air at any given point in time. Also, with the GOC behind the centre of lift of the wing with a symetrical airfoil, stabs don't push down for the wing to sit at a positive angle of attack to generate lift, this is propogation of a misunderstanding from the real airplane world where they used to use cambered airfoils with strong negative pitching moments.

Increasing the angle of incidence of the wing and stab will force the fuse to fly with a nose down attitude which not only increases the downthrust but also raises the stab relative to the wing so adjusting the wing upsets/changes a lot more than adjusting the stab.