Anyone experiencing vertical play when the blade is closed? Mine has developed 1-2mm (1/16"). To reproduce, close the knife all the way. Then pull the blade up a bit. Mine does not return to fully closed against the stops. It just stays there. Shake it up and down, and the blade rattles up and down.
I have a first production run unit, so my guess is that the stop slots in the liners were machined a little too far at their closed end. A bit of burr at the end of the slots would have masked the problem. Over a few months use, the stop ends of the slots lengthened a tiny bit, allowing the lock bar ball to drop all the way into the blade detent before the stop pin hits the ends of the stop slots. Now the blade can move up and down freely when closed, due to the lock ball having bottomed out early (or the stop pin hitting the ends of the slots late, depending on how you look at it).
I have contacted Drop support about this, and they recommended reaching out to the run discussion as a first step to see if anyone has suggestions. I have a hunch the only remedy would be to peen the closed end of the stop slots in the liners to shorten them enough to prevent the lock ball from dropping all the way into the detent. I think this might have an adverse effect on the WE lifetime warranty, though.
So ping me if you have any thoughts. I'll let this soak a few days for response, and then get back in touch with support.