Originally Posted by
ahicks
Something lost on some people is that tail should carry some of the plane's weight. All else being equal, I can see where a longer tail moment might move the CG back. Taken to extreme, it would be impossible to keep "all else being equal" due to the weight of the structure required to get the tail back that far and remain structurally sound.
Not true, most of our models (and real planes) are set up where the stab is usually lifting DOWN for stable flight.