The guy with YouTube channel Rotormast has been working to master building and flying a scale RC V-22 Osprey. You can see in this 6:51 video he's pretty well got it conquered! It's extremely stable and controlled, even in hover, and twice in this video (all in one flight) he transitions to full flight and back. Looks like a pretty stunning accomplishment to me. Bravo(!) man for sticking with it and succeeding... and thanx for letting us see it!