I am not a string breaker, I play 17g poly mains and 17g syn gut crosses and always cut them out before they look like they're even close to breaking. I defintaely prefer 17g to 16g. If I go to natural gut mains, can I expect similar durability to the other two types with 17g? 2nd question, I'm a firm believer that polys perform much better at around 50lbs or a little lower, rather than up even just a couple of pounds. What about nat gut? If I like poly mains at 49 or 50, is that a good starting place for gut?