OK. Take a blalanced model when properly balanced upside down and then put it right side up {on a good balancer} and it will appear to not be balanced. I did not say it wasn't. It is so sensitive to any of the tiniest changes that the average person will fight it and end up without the proper balance.

It is a mass and center issue not magic wheels. Which way would you more easily balance the empire state building? On its base or on the tip of the tower? Of course with the mass low ot the base it would balance easier than trying to get the weight right while on the tip of the tower. Same with a low wing plane, you bring the mass below the line at which you are balancing from (the surface of the wing) and it hangs rather than trying to flip over.

Also it does not matter if you fly upside down or not on weather it is easier to balance inverted and that frankly sounds like a lame answer to a serious question. Why, for many years, has it been taught that it is easier, and should be done, to balance a low wing plane inverted?

Also if you read my post correctly you will see that I said "Depending on the plane you will see that it acts like it is out of balance. Not that it actually was out of balance.