The only parts of the airframe I am fiberglassing for strength are going to be the firewall area and the wingtips. I am fiberglassing the rest of the wing simply because I don't like to monokote over fiberglass patches. The fuselage will be plenty strong enough as per stock directions. I am considering a complete fiberglass airframe because it looks better, and it is slightly more aerodynamic. I really am not too concerned with weight gain, as I am sure I can keep it minimal- maybe only an ounce or so heavier than monokote. The cool factor doesn't hurt, either.