Not sure what you mean by the plane is too big to balance. You hold the plane up under the wings near the fuselage at the cg point. I cut 2 round pieces of electrical tape and stick them at the cg point about 1 1/2" out from the sides of the fuselage. Have the nose of the plane pointed toward you and you can feel where the tape is and lift on the "marked spots" with your finger tips. I look for a slight nose drop of about 1 to 1 1/2" which has worked well for me. When the CG is ok, just remove the 2 pieces of tape. Just a note: for high wings, check the cg with the plane upright. With low wing planes, check the cg with the plane inverted. Does any of this help?[8D]