Yep that's the bit more complicated way. There is a really simple way to do them which will only take about 5% of the time to do this way.

Simply take a toothpick and put a tiny dab of super glue on the toothpick (just enough to wet it not enough to make it so you can even really see the glue on the toothpick). Wipe it on one end of the trim thread and quickly secure it on the blank next to the wrap. let that dry for about 10 seconds then wrap the single turn around the blank and do the same thing with the glue/toothpick to secure the other end. Trim the ends and your done. Real easy, real fast and gives the same results.

Steve