I watched the video clip too and I didn't see the Thys 600NE sidelock at all. (I have a special intrest since I own a Thys sidelock DR - but not a 600!) I did see the 577NE boxlock. I believe his 600NE Thys sidelock hit the market last summer, fyi. Don't know when the filming occurred. Maybe even he got tired of the 600's recoil?