Wondering if NRG2 can last a while once the fraying starts or if that is pretty much the end? I've only hit with it maybe 3 times and I have a tournament in a week. I'm not a string breaker at all in general (I get several months out of cheap 17g syngut) but I'm not familiar with this string. Playing with an 18x19 pattern. How long does NRG2 last for you once the fraying starts?