Has anyone had any experience with SWFA optics? I just picked up a nice little long range pea shooter and it has a SWFA SS 10x42 piece of glass atop. I have no experience with this brand, but being newer to the long range sniper stuff, I didn't want to make a judgement without doing some research. Optimally I would love to get a NF optic, but if this is comparable and I don't have to spend any more dough, then I'll be happy to keep her on it. Thanks.