RE: Balancing a Mid Wing Plane?
To find the correct balance position, you must have the plane parallel to the centerline of the fuselage(a line from the center of the propshaft through the center of the back end of the fuselage). Usually the horizontal stabilizer is parallel to the fuselage centerline. I use a very light bubble level on the stabilizer to find this position. Now with the balance stand at the correct position for balancing, you will see if the plane is nose heavy or tail heavy. Add weight to balance with the bubble level showing the bubble centered.