I'm using natural gut, and my crosses are fraying.
On the other hand, the only kind of wear I can see on the mains is that the white paint is wearing off.
Am I hitting the ball wrong? Can I still expect the mains to break first?
I have strung my son's racquets poly mains with gut crosses and poly mains with quality multi crosses. Both hybrid crosses broke with hardly a mark on the poly mains. Both types had excellent life though. Generally the poly will notch up the softer crosses. IMHO stringing the poly low helps with durability enormously. I did notice the gut shows fraying way before they break.
Oddly enough, the last couple of strings I have broken in my natural gut(m)/syn gut(c) hybrids in my Catapult 8 V-engines have been the synthetic gut crosses. Go figure.