Aerostude
Have to say I agree with Bellerophon
Although it is nothing like so important to appreciate as the stuff you are both discussing, there can be a structural problem with a forward CG that actually sets the forward limit.
It goes like this: Forward CG increases stability therefore aircraft needs more down force at the tail to manoeuvre. When pulling a very forward CG aeroplane to its g limit, this force may be so great as to shear the tail off downwards. In this case the rear fuselage structural strength limit sets the forward CG limit of the aircraft (The Harrier is an example). Why not make the rear fuselage stronger? Because nobody wants to increase structure weight if you can make do with a less forward CG. Another example of compromise in aircraft design.
JF