I have read over the years that Mike Sigel may have done the same thing, with his line of custom cues.
He may have just overseen the production of them, and then signed his name on each one before they were finished.
By the way, I am not referring to the super cheap line of Mike Sigel cues that he had imported from China, which I have seen some sellers try to sell off as true customs made by him, because they are like night and day, when compared to the quality of his customs that he / himself signed.
I am sure that whoever made them was a very good cue maker though, because his customs were excellent hitting cues, and very good quality, in my opinion.
I talked to Mike and I believe he made the high end custom cues himself. He has had several lines of signature cues made by others also. He spent a small fortune with Bludworth setting uo a really nice shop at one time so he could build cues.