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

1–
: All set ; 1c+4c turn RH ½ into promhold **while{2}** 2c & 3c cast to the ends ; 1c with 2c & 4c with 3c ½Reels3 across, Rsh to the M
9–
: 1c+4c ½RHA | turn RH ½ into promhold facing 2cnr **while{4}** 2c+3c set | cross RH ; ½ Diag Reel4 on 2diag, (Rsh to W) , 1c+4c pass Rsh to face 1cnr
17–
: ½ Diag Reel4 on 1diag. (Rsh to M) ; 1c+4c pass Rsh ; 1c/4c dance up/down between end C, split and cast to (3,1,4x,2x)
25–
: 3c+1c & 4c+2c, R&L (3,1,4x,2x)