From a Generalized 3/4 Tag (usually a R-H 3/4 Tag) or other applicable formations.
- Little
  (Outsides 1/4 Right & 
  Counter Rotate 1/4
  as Centers 
  Step & Fold);
 
- Split Circulate twice;
 
- Outsides 
  Counter Rotate 1/4
  and Roll as the Center four Concentric 1/2 Zoom.
 
Usually ends in a 1/4 Tag.
Notes:
- 
The Split Circulate twice is also referred to as Star 1/2.
    Callers often modify the amount to turn the Star (each 1/4
    turn of the Star corresponds to one Split Circulate).
 - 
Callers often Replace  the Split Circulates 
    with another call or Interrupt  the 
    Split Circulates with other calls.
 - 
On Scoot & Plenty the Outsides 1/4 to the
    handhold unless otherwise directed.
 - 
After doing the Split Circulates, if all Centers are facing Out they
    U-Turn Back (away from the Center of the Set) and Touch.  If all Centers
    are facing In, they Touch.
 - 
It is our opinion that when Plenty is called from
    Diamonds, the caller should say something like 'Outsides go As You Are'
    or 'Centers Start A' so that the outsides do not start with a 1/4 Right.
 - 
The caller can optionally give a direction (In, Out, Right, Left) for
    the Outsides, in which case the Outsides 1/4 toward the given
    direction & Counter Rotate 1/4
    (e.g., Left Plenty, Out Plenty, Scoot & Plenty In on the outside).
 
Scoot & Plenty [C1] (Lee Kopman 1972):
 From a 1/4 Tag.
  Scoot & Little; Split Circulate twice; Outsides Counter Rotate 1/4
  and Roll as Centers (Concentric) 1/2 Zoom.  
  Ends in a 1/4 Tag.
Interlocked Plenty [C3A]:
 From a Generalized 1/4 Line or other applicable formations.
  Do an 
  Interlocked Little [C3A] 
  (Centers Step & Cross Fold as Outsides 1/4 Right & Counter Rotate 1/4);
  Split Circulate twice; Outsides Counter Rotate 1/4 and Roll
  as the Center four Concentric 1/2 Zoom.  
  Usually ends in a 1/4 Tag.
 See also  
Little [C1].
In particular, there is a discussion about the
  usage of calling Plenty from Twin Diamonds.