From Columns.
First Two 
  Checkmate The Column
  as Last Two Extend (using Circulates) to a Box, 
  Cast Off 3/4, Slither, and As Couples Extend.
Ends in Parallel Two-Faced Lines.
| |   |  |   |  |   |  |   |  | before Checkover
 |  | after First Two Checkmate
 as Last Two Circulate
 |  | after Centers Cast Off 3/4
 and Very Centers Slither
 |  | after As Couples Extend
 | 
 | 
Checkover But Hold The Two-Faced Line [C1V]:
 Do a Checkover but omit the As Couples Extend.
1 By 2 Checkover [C2V]:
 #1 'Checkmate' as #2 and #3 1/2 Circulate, Cast Off 3/4 &
  Slither, and 'As Couples' Extend.
| |   |  |   |  | before 1 By 2 Checkover
 |  | after 
 | 
 | 
Turn Over [C4]:
 From a Mini-Wave Box. Cast Off 3/4 and Slither.  Ends in a Two-Faced Line.
Checkmate The Column [A2] (H.P. Williams 1975):
 From Columns.  
  First Two Circulate 4 spots &
  1/4 In as Last Two Circulate twice, 1/4 In, & Circulate.
  Normal Columns end in Parallel Two-Faced Lines.