thank you frets24.

Well my dilemma get's bigger every minute. if you can see picture cg1, you can see original
CMP manual with balancing point at 140-145mm from cord. people are flying this plane from 120 to 140 mm.
My CG at the moment is 135 without lead under the cowl. I have used two different calculators
and results are 141-142 mm.

What should I do?
If I have to make it some 120 mm then it will have about 350 g (0.8 pound) of lead in the nose of plane.

have made balancing with empty tank, model upside down, gear retracted.