From a Double Pass Thru, 1/4 Tag, or other applicable formations.
Centers (Step To A Wave if not already in a Wave) Swing-Slip; Outside 6 move
clockwise (if the End of the Center Wave is facing clockwise) or
counter-clockwise (if the End of the Center Wave is facing counter-clockwise)
one position within the Outside Six and adjust as necessary to end in a 1/4 Tag.
Repeat the above movement for each within the given fraction.
If no fraction is given, repeat the above movement for a total of 4 times.
The CALLERLAB definition allows Twin Diamonds as a starting
The new Outsides always end up as an In-Facing Couple, no
matter what the starting formation was.
anything & Circle fraction [C2].