ORIGINAL: Jack H
D. shifting the motor back to conceal it deeper in cowl '' scale'' will bring the C.G. forward, providing further mechanical advantage of the full flying stab in pitch.
I got you now. Yes, this will indeed shorten the distance between the the prop boss and the C.G. position in the wing. Note that the wing on the BUSA eindecker is NOT in the scale location, bur rather an inch or so further back. If you move the wing forward to the scale location, which would amount to a major re-engineering of the fuselage, then the nose moment will be very short. And this means both that you need to get as much weight up front as possible (I had all three body servos, batteries, and receiver ahead of the CG) and you'll need to fight to keep the tail light, thus my recommendation for 1/4 balsa instead of hardwood.
On the original, the main point of "all that stuff behind the pilot" was to balance that big lump of metal up front. Is the aircraft too nose-heavy? No problem, just tack on an extra foot of tail!

We modelers have the opposite problem. Ah, if only engine manufacturers would start making heavier engines!