Okay, back on topic. Ponder this fellow U Can Do'ers. With a Saito 100 this frame is carrying just under 21 oz. of engine up front. If you were to scratch build a UCD what percentage increase in size would it have to be to accomadate a 3lb. gasser? I know someone already did a weight mod on a G23 and is flying it but its got to be a lot of weight upfront. Also take into consideration not only the engine but the weight of the additional support equippment that goes with gas. Is it feasable to figure out the percentage of weight increase of hardware and apply that to determine how big the increase in size is required? Again I need a math whiz or would it be an aerodynamical guru? Joe