I see that the Saito 100 comes in about 20 oz. which is half a pound lighter than any of the 120s that I can find. I had one comment where the person mentioned having to put a lot of lead in the nose when using a 2 stroke, but I am not sure if his "a lot" is two ounces or eight. I also would like to know if he covered with glass or plastic film. I would be nice to know in advance what weight would be necessary to balance the plane so I could buy the right engine and not use lead. Oh well, I may not know this answer until I build the second dream P-47.