Mxsmanic wrote:

If I'm alone in the aircraft, in the left
seat at the front, can I put an counterbalancing weight in the rear
seat on the right, or would putting weight in a diagonally opposed
position make the aircraft unstable?


Yes, it would be slightly better to do it that way, since it moves the
CG to the center of the A/C. It would only cause instabilty at
EXTREMELY high roll rates. I ran one of my tanks dry once, when I
needed to change a leaky drain. The other tank was nearly full. It took
a fair amount of aileron to overcome the weight difference, but not
even close to the maximum. CG's off the centerline have only minimal
effect on pitch, and should not have a noticable effect on elevator
position.

Bud