1–
: 1c set | cast off two places (2c up) and lead up to 1cnrs
9–
: 1c set to 1cnr | turn 1cnr RH and join LH in the middle ; BiL | turn 1¼ LH to 2cnrs
17–
: Repeat with 2cnrs | cross to (2,1,3)
25–
: 2c+1c+3c circle6 and back.