From any formation in which the anything call ends in a Trade By,
  Completed Double Pass Thru, or R-H 3/4 Tag.
Do the anything call; Outsides 
  Cross Cast Back
  as Centers Complete The Tag (Pass Thru or Step Thru as necessary 
  so that the Centers are back-to-back); all Trade; Centers Trade.
Ends in Facing Lines.
Notes:
- 
Some callers believe that The Axle means do the last 3/4 of 
    Pass The Axle [C1], 
    hence they believe it is inappropriate to call The Axle from a 
    Completed Double Pass Thru
    (since the Centers can not do the first part of the call).
- 
Remember that Cross Cast Back [C1] is a Left-Shoulder Pass.
anything The Axle But Cast fraction [C1V]:
 Replace all Trade with a Cast Off fraction.
  You must then remember to do the final Centers Trade.  If the fraction is
  1/4 or 3/4, you will end in Back-to-Back Lines.
"Z" Axle [C3B] (Dave Hodson 1980):
 From the "Z" obtained from a Line with the Centers in a Mini-Wave after a Step & Slide.  Outsides Cross
  Cast Back; all Trade; Centers Trade.  Ends in a Line.  This is a 3-part call.
 See also Cast Back, Cross Cast Back [C1]
 and Pass The Axle [C1].