Back to the original post. Kenny took the same airplane design and replaced the wing with a bigger one. In order to keep the CG at the same %MAC, the tail size and moment would need to be scaled up as well. Relative to wing area, a smaller tail size means the CG needs to move forward. Thus the needs for TVR calculations or more in-depth calcs. I think the TVR effect will far outstrip the effect of the airfoil pitching moment here.

Don't be afraid to make the tail even bigger than TVR calculations suggest. A big stab allows a much further aft CG, and also damps dynamic motions, further allowing agressive balancing -- With an oversized stab, even an out of balance airplane is manageable. Plus, you can get a lot of elevator power to boot.