{{explanation}}
3s & 4s start on opposite sides

1-8
: All 4 couples set, 1s+2s also 3s+4s dance 3/4 R&L. End 2 1 (4) (3)
  with 1M followed by 4L facing up/in, 1L followed by 4M facing down/in
9-16
: 1M+4L also 1L+4M dance Tandem Figs 8 across (RSh to 2L/3L).  2 (4) 1 (3)
  with 4s & 1s facing clockwise
17-24
: 1M+4L also 1L+4M dance Tandem reels of 3 on sides, RSh to 3L/2L
25-32
: 4s+1s dance LH across, 4s face up, 1s face down; 4s/1s cross RH dancing
  out of ends & cast down/up to end 2 4 (1) (3)