My Big Stik started out with a ASP 61 and trike gear. Later on I switched to gas using a Zenoah G20 converted to EI by Ralph Cunningham. To offset the additional weight of the gasser I relocated both rudder and elevator servos to the rear, used dual servos for the ailerons and changed the l/gear to a tail dragger. At 68" w/span it has an all up weight of approx. 8.5 lbs and still flies ever so sweetly.