This is something I'm working on, well, actually this one is gona be for me to carry and test before I offer the design for sale. Here's the semi-working pattern and the knife in its early stages: The liners are .060 6-4 Titanium, with a Ti backbar, and the blade is Mosaic Damascus. Here's a close up of how I build my "floating pin" design. The liners and blade are drilled with a 3/32" bit for the open and closed stop positions, then another hole is drilled around the 1/2 way point in the arc of travel. I then use a 7/64" mill to complete the cut in the liners. I personally like this method better than cutting an arc in the blade, as it creates fewer issues. I also use a 3/32" pin rather than a larger pin....I've found that it creates more room within the liners, and after carrying one for over 5 years, have found that anything much larger is overkill. The only disadvantage to cutting the liners instead of the blade is that it can sometimes limit the ways you can mount a pocket clip (I always use "tip-down" mount style for pocket clips) Later this morning I'll rough grind the blade and get it heat treated. As I continue through the steps I'll take more pics and post them on this thread.