Hi folks, new here. I just received my second ZT today, a 0550. I'm a bit new to frame locks and my question pertains to the lock-up percentage. My knife locks up nicely with no blade play, but it seems a bit later than it should be. Please take a look at the pic and let me know what you think. Is this anything to be concerned about, or does it look normal? Also, that area at the end of the lock bar that looks like lube or dirt is actually some rough machining, though it seems to be purely cosmetic. Thanks