I'm using the carbon express nocks on a stock bear super mag string, which bear told me was 16 strands of fast flight and that the center serving thickness would not matter even though I asked for it as well.

The nocks fit very tight on the serving. I have to really snap them on. Turning to bow so the arrow points hanging down from the string, no amount of tapping the string will cause them to fall.

Too tight, right?

What's the best way of adjusting the nocks to fit better? Simply spread them manually, or sand them with something?

How do you know when you have the perfect fit?

I'm concerned with excess noise and loss of energy the tight nocks surely bring to the party. Any input is greatly appreciated