I use a tied on nock point with braided serving material, lots of knots then superglued to itself.

Have shot like this for a few months without issue.

Today I was shooting really low, discovered my nock point had slipped up a good 3/8".

Corrected it, then tied off above it with dental floss. However I'm now nervous as $*%@ knowing with my luck Murphy is usually right around the corner.

I have contemplated gluing it to the serving, but I use a B-50 string that may still stretch, and am not convinced that if it does stretch when I twist it back up the nock point will be in the same spot. Will it?

What do you use for a nock point? Any slipping problems?