Thanks, 049flyer, for mentioning about Jim Walker doing the same type stunts. That I didn't know. As you may notice I put the silly grin face when I made that statement about the 3D Bi-Slob. The term 3D has come about in reference to extreme aerobatics in RC. Just watching the videos indicated such existed long before that. With the simplicity of the Bi-Slob makes one want to re-create one and try it. Sounds like fun.