Well they finally pushed me over into 3d i am currently fly n the wings off of a twist and have a seagull 540 finished with a saito 125 on the nose. The only thing that keeps whipping me is the cg. i put it on the cg machine at 100 mm as instructed, i put 4 oz of weight on the nose and she just doesn't want to balance. If i add lead one at a time it never just balances it tips front or back. I have never had this problem before. Can anyone give me some insite?