Are we talking about the same plane? They advertise the weight dry between 13.5 -16.6 lbs. Yours weight 12 lbs with an OS 1.08 installed. Installing this powerplant would require adding considerable noseweight, roughly about 1 lb. My airframe weights 16.4 lbs dry. This is at the high end. Thanks' for replying but your information was to vague.