I like serving above and below since I shoot split finger.

I use plain old sewing thread. Just tie a knot over and under till it builds up and then coat with superglue gel. Makes a great lightweight adjustable nocking point. I use one above and below.

serving string here myself...you can twist it up and down the dtring for tuning very easily

I use a brass nock to tune a bow or install a new string. After it's tuned, I remove the brass and tie on a nylon serving thread nocking point above the arrow and one below the arrow.
Jerry

I've been using brass nock sets ever since I started shooting a bow. I suppose it's just one of those things that's worked fine for me, so I never saw any reason to change.

Didn't quite understand Rob's instructions as the photos don't show up on my computer.
However when I use floss, I just tie it on the same as reserving the string.  Rap over the tab end 4-5 wraps, built up the nock pt. with floss then back wrap about 4-5 wraps.  I put a coat of fletch tite on the string.  Usually lasts about a year.  By then I usually have to reserve the string anyway.