Let's not get too whacked out over the gyroscopic precession. Remember, what matters is not the just the precession, but the total sum of all the moments on the airframe. So if the precession is nose up, you can move the wing slightly below the fuselage center line. Then you can move the thrust line above the centerline. Then you put the wheels on the bottom and they create a nose-down moment.
So basically, the modern typical Nobler-derivative planform has it just about worked out, LOL!
To say that there's a nose up moment for precession in level flight so I need stab incidence is way oversimplifying it.
The dynamics of a CLPA aircraft are incredibly difficult to quantify. Until someone is willing to give me and some of my fellow aerospace engineers here a grant for several million dollars, supercomputer time for CFD and some dynamic analysis at Calspan we're all pretending we know.
And with that said, there is, and always has been - a lot of snake oil in this hobby. Head games too.
My $.02 is that if you build a straight-as-@#$% airplane of a proven design, build it light with the correct control throws and have a reliable, correctly sized power plant... you're pretty well there. From that point it's about trimming and what you do with the handle.
All in my humble opinion and I will respect and defend your right to disagree because we're all in this together,
Chuck