I think you’re confused. Just because some people need it for the 31, doesn’t mean everyone will and CRK isn’t saying that it requires it. My 31 came with no such documentation. There’s plenty of people that needed it for their 21, and again, not everyone did. So just to be clear, you have no first hand experience with it happening on the 31? I haven’t had issues with no loctite being on the screws, they pop just fine when taking it apart and don’t move. I can also take mine apart and put it back together with the one wrench they supplied. Sounds to me like the knife is working just fine.