Reference: Twelve Dozen Stitches in Twelve Months
The French knots have been changed to blue seed beads in this stitch. The depth of the rickrack changes the stitch because the straight lines at the base of the detached chain line up instead of staggering.
I think this would be a good seam to use really thin rickrack in, and stitch the detached chains outside of the rickrack, with the straight stitch on the rickrack. Rocailles beads would be a great size to use with the mini rickrack.
I hope you are enjoying working with rickrack…we have several more seams to go!