If you order a custom string, a good string maker will use the serving size that fits your type nock--at least close.
You're too modest, but I'll tell it like it is:
If you order a custom string, get it from Chad and tell him what nock you use. If he isn't familiar with it, send him one. He'll match the string serving to the nock. That's what I do anyway.
Now I feel better.