I'm not doing any researche and I'm not a sales man. It's just very interesting why does Mike Kung flyes only U-turn. As you know Mike Kung is great and proffesional pilot. The world speed record also was set flying a u-turn. iIt's so strange for me if there are so good results for these wings than why nobody fly them? But anyway I have understood that there are no pilots in UK with a u-turn wings.