How's the blade play? My biggest beef with my para, which is probably two years old now, is that it's always had a bit of play (front to back), and I can't seem to adjust it out. Don't get me wrong, as I flip it out and close it, and flip it out and close it...while typing this question, I'm reminded about why it's such a great knife, and I can almost forgive a little blade play, but...