ORIGINAL: rgburrill
Dumb, dumb. I did not get that is what he meant. You, and he, are correct, moving the wing back would move the required CG back.
Thanks for pointing that out.
Yes, that too, but more important: moving the wing aft will move the center of lift aft, increasing the distance between both centers.
That distance is the stability margin that every plane needs in order to be stable in pitch.
What the OP has now is a distance between the CG and CL that is smaller than ideal (more pitch control authority, but less pitch stability), zero (dangerously neutral) or negative (tail heavy or total instability condition).