My sig complete minus fuel weighs almost exactly 6 1/2 lbs. However to balance I will need to add 6 oz. (roughly) to the nose. Would it be worth it to buy new engine mounts and slide the engine foward? I have it mounted as per plans. I just think 6 oz. seems like alot. Plus I was happy the plane came in at such a light weight. Be a shame to heavy it up just to balance.