Has anyone tried the new Spyderco Power Lock system, can you give any review of it? Background: I love the Spyderco Chinook knives. The blade shape is not super practical, but extremely cool. I own the Chinook 3. Spyderco is releasing the Chinook 4, which will have this new Power lock system. I can't find many details about it, and interested to get how it works and the advantages it will offer over the existing back lock.