{{explanation}}
On 2nd chord, 3c+4c change sides (to 1,2,3x,4x)

1–
: 1c+4c cross RH | cast to middle (2c+3c step to ends) ; 1c+4c ½ Fig8 round nearest end couple (2,1,4x,3x)
9–
: 1c+4c R&L, finish facing end couple (no polite turns) (2,1,4x,3x)
17–
: Parallel Rsh reels4 on the sides, but 1c+4c finish in line across, 1M+4M in the middle RHJ, the W outside
25–
: 1M+4M turn RH ¾ **while{4}** 1W+4W chase ¼ cclw inside the set | 1M+4W & 4M+1W turn LH ½ ; 1W+4W turn RH ¾ **while{4}** 1M+4M chase ¼ cclw | 1M+4W & 4M+1W turn LH ¾ (to 2,4,1x,3x)