I also made some smaller beads to incorporate into the knotted sections. This next photo gives a better look at the knots, the additional beads, and the sliding section.
Last, I decided to try a really simple closure using elastic thread. I did add an extra flat bead in the area opposite the band section. This provides a gentle area against the delicate part of the wrist, and also serves as the place where I could hide the thread ends. Both designs are easy to use, even if you have to put the piece on yourself.