I've seen one or two that he built, but never seen his kits. Clay Smith is an excellent maker, so I would assume the kits would reflect that. However, the final result would be up to you, no matter where you get the kit. Most kit offerings fail on barrel length. The majority, if not all, of Carolina guns had 46" to 48" barrels. Ben Coogle can supply the proper kit, but Clay Smith may also supply a longer barrel if asked. Much of the hardware from Bens kit is directly copied by him from dug relics, many that he dug himself, and come with the proper lock from TRS. I don't the origins of Clays parts, but are probably also correct, or very close.