The Cygnus from Artisan Cutlery is amazing. The carbon fiber handle is backed with a steel insert on each side for stability and to anchor the liner lock. The blade is stone washed D2 steel and is fashioned as a reverse tanto saber grind. There is a tiny false edge to move the blade’s center of gravity farther out from the pivot point. This is assisted by three triangular openings in the top of the blade. There is mechanical advantage gained by having the acting center of mass extended from the fulcrum or pivot point.
Author Frank Karl has written several pieces for Knife Magazine. This is from his blog.View Linked Article