One thing I could do is attach the wings temporarily to the fuse without the wing tube. If they are flush, then I know the wing tube is longer.
Simply slide both wings ALL THE WAY onto the wing/tube, minus the fuze, measure the distance between both wing roots, (at the wing/tube) call this Dimension "A"....... Now slide a tape measure through the fuze wing/tube/socket & measure the fuze width at this point, call this Dimension "B"...... Dimension "B" should be greater than Dimension "A"........