Joe,
Im new too, I tried sanding mine out, but make sure to touch up with 2000 grit, seems like the string will fray less.
Also opened a couple up over a candle, but you have to have really good timing, or you'll cook'em.
Now with sanding, or opening, I developed a problem of too loose. Seemed like none were just right. so what I did is go a TAD too loose, and then wrap a couple thin strips of good ole duct tape (praise the good Lord for duct tape, man there is nothing you can't fix with it)above where the top of the nocks sit. this will keep the back of the shaft from sliding up, and when you press it down it will stay snug when you walking thru the woods.
Farmer