I think the custom ArcLite is one of the nicest neck knives on the market.
I gave my 420V version a sharpening the other night... I don't know how Darrel does the heat treat, but I got this really wickedly sharp edge, rivaling carbon steel knives (but holding edge longer and SS). Must be a fine grain structure from a good heat treat.
Light, useful blade grind, ergonomic, excellent.
Recommended, for sure.