From applicable formations.
Center 4 do the first anything call and the resulting Ends (of that Center 4) move away from the Center of the Set without changing their facing direction (i.e., Stable). The Others (original Outsides) work around the Very Centers to do the second anything call, ending as close as possible to the positions vacated by the resulting Ends of the Center 4.
Reverse Checkpoint Recycle By Touch 1/4:
Dancing Hint: The original Outsides should usually delay moving until the Centers have almost completed the first anything call, so that sufficient space is available for the Outsides to execute the second anything call.
Note: The original Center 4 become the Very Centers and Very Outsides of the final ending formation.
Checkpoint anything By anything [C2] :
From a 1 x 8, Point-to-Point Diamonds, or any other
applicable formation in which there are Centers of each side.
The Centers of each side work together, concentrically, around the Very
Center dancers, to do the first anything call (if possible ending
so that they have changed the long axis of the starting formation); Remaining
Outsides (2 or 4 dancers) move into the Center (without changing their
facing direction) and work with the original Centermost dancers to do the
second anything call.
Checkpoint anything By anything [C2]