I highly recommend the Cobra. I scratch built a cobra a couple of years ago but I highly modified the fuse and wing construction making it also a little larger. Flying it with a YS63 and its by far the easiest plane to hover and torque roll I've ever owned and flown including some 33% and 35% planes. It doesn't do everything great but for hovering... You can't beat it. Building one for a friend and a spare for myself now!