It is. Do a little research on light, tail heavy (44%/56%) mid engine cars with positraction and you will see that right after tires using front end fuel weight to adjust the weight distribution is at the top of the list for over/under steer adjustments. While I am working on the tire and suspension solution, for now all I can control is fuel weight.

I know you know how to handle your paticular car very well but 911 and 930 are very different creatures from the nose heavy automobiles most of us are used to driving.

Are you really trying to tell me that if I am understeering and I can reduce this by adding weight to the front of the car that I can not go through a particular radius turn faster than when the front end was plowing at lower speeds?

You don't have to belive me if you don't want to, but think about the physics of this for a while and you might want to reconcider your above statement.