I'm having a blast with my 1/4 scale J3, 108" wingspan, OS91 four stroke, 12 3/4 lbs. When I'm feeling lazy, it will putter around the sky just like the real thing. When it's show time, the big Cub can handle some cool stunts, my favorite being a true knife edge all the way around the field. It has about 30 flights since the maiden this past winter. Hauling a big Cub around in your vehicle can be a pain. I had to make a special rooftop carrier for the one piece wing. Hope I don't push the aerobatic envelope too far any time soon.