Just purchased a new Manix via the net. It arrived yesterday and has many many problems. I tried to return it but with no avail. The rear handle screws are stripped out and the scale rattles against the frame. The lock also doesn't hold firm. It closes with very little pressure. The lock itself is very stiff and hard to push. Is there anything Spyderco can do about this or am I basically screwed? The knife doesn't have any signs of being tampered with per se (scratches, etc.) Maybe I just got a lemon?