I was cruising around the CQC knife site, when I happened upon some really cool (at least in concept) friction folders by Greco. Anyone had experience with these, or with friction folders in general? Are there legal things to consider with these (i.e. considered gravity knives, etc.)? It just seems like a good idea for a knife to use for utility that I won't care about if it breaks, and there aren't any issues with length, or with having a locking folder. Am I dreaming, or are these actually viable as user knives? Thanks!