I know, a bit anticlimatic after Flatlock Stitching, but pin tucks are cool, too, I guess.
Locate your blind stitch presser foot. Hint: if you can’t find it, and you *just * had it, check to see if you used it as a book mark in your owner’s manual. It may have taken me 30 minutes to find mine this way today. Maybe.
Thread machine as for 3thread overlock. Remove RIGHT needle. Keep your left needle securely in place, though.
Sew and repeat for all tucks