Simos--
Maybe I'm making it seem more complicated than it is. A normal butterfly has the chains going in opposite directions, and since this is also a butterfly, the chains also need to go in opposite directions--they're just rotating in a different plane.
I shouldn't have said "weave behind the back"--the swing behind the back is just a regular crossover swing, and if you are transferring both hands from one side to the other, you'll want to insert a beat between them (at least, I will). Doing this move in front is trivial, even for a beginner like me. The real trick seems to be in finding just the right plane of rotation so you don't biff yourself, and spacing your hands just right to avoid tangling. And of course in having really flexible shoulder sockets (which I don't).
I can rarely hold the butterfly for more than two beats, but I can now do a left-side butterfly for two beats, then transfer to the right side and hold that for two beats. I haven't seen myself doing this, but I'll bet it looks pretty cool--that's one of the neat things I've discovered--when it feels good, it probably looks good.
[This message has been edited by adamrice (edited 15 January 2001).]