Building up nocking point

[SW41]

I think my nocking point on the center serving is possibly a bit small for the nocks. It was too big for a small G nock but I'm wondering if it is a tad small for the large ones. I changed the centre serving recently.

The arrow clicks on okay and is held there but it isn't as tight on as before.

To build it up a little is it best to use floss or another strand of serving?

[geoffretired]

Nocking point fit is a three part task.
One part is the way the nock fits to the thickness of the serving. The string should be able to twist within the nock without the arrow wanting to twist with it.
Another part is how close together are the top and bottom nocking points.
The third is the height to which the nocking point is built up.
The second two are linked. The lower the profile of the nocking points, the closer they can fit to the nocks themselves, without interefering with the arrow launch. I tend to make mine as low as possible; just enough to prevent the nock from getting outside.
Dental floss gives a very low profile but can go soft if it isn't built up enough. Serving thread can be pulled in tight so it has low profile and is strong enough to last well.

[flamingbladerider]

How do you meen its not as tight. If the arrow stays on when you point the bow down and needs a tap to dislodge it, then the serving thickness is fine.