I am a longtime Spyderco fan. I happen to have an Emerson CQC 8 sitting on the shelf, waiting for an owner. When it came in, I looked at it pretty closely, took some photos of it to post on FaceLook, and as part of that, I opened and closed it a few times. Not knowing that such an act was problematic, I had no problems.
The knife opened, the knife closed.
A fellow strongman competitor commented on my pics, stating that he had owned an Emerson CQC 7 for some years, and that he likes the look of the CQC 8, and wishes to own it. He told me the action of the 7 was superb.
But what do I know?