As a matter of fact, I am doing Planche and Iron Cross training. All of my workouts center around these type of exercises. It is amazing how much stronger I have gotten in such a short amount of time.
have you noticed the way that bboy Junior (seen in the first vid I posted in this thread) lowers himself in an arc or the way that the guy in the ghetto workouts does the circle pull ups (that he calls the running man), or the archer push ups demonstrated on the elite rings website?
Well I have recently started adding similar variations in my planche and lever training, these circular movements are another intersting way to hit different ROMs and increase tension unilaterally. The pulling variants of this are also a great way to work up to one arm pull-ups.