Hello Graham, its flown for four short flights and has not been over 500 ft. I dont want to scare it just yet. No wing heavyness, no buffet from the leading edge radiator. Ailerons feel good. Drooped of course. And that big elevator. Well quite nice, no buffet with no counter weight. The trim makes it very stable. I will reduce the travel a little. Split flaps are great. Ah yes the engine, pulls it off the ground in 600 ft at 40mph, very quiet and nothing vibrates. Prop is an Ian Henry. It does need a bit more cooling and am doing that now. IDI diesels generate more heat than others but are not as harsh. Landing is a breeze. The big bugger was back at 45 mph with flap and rock solid. hHowever lots to learn, Chas