CNC/EDM is far more accurate for sure than hand production, and since the functionality and mechanical integrity of the resulting double depend upon that accuracy it is surely a huge plus. Certainly let the hands execute the aesthetics thereafter, but nothing wrong with the machines getting the thing right to start with. All manufacturers have access to this technology, but unless the primary functional design is correct it is all a waste of time. So what differentiates manufacturers, IMHO is the smarts of the desigh itself. Hoenig is one such, and the Heym 89B looks to be another. The USA probably has the best CNC manufacturing capability anywhere, so surely it isn't a big stretch to marry good thought and best machinery and voila! Old World skills will unfortunately have a diminishing role - the future belongs to computer controlled engineering. The only question is - is there a sufficient market to support another double manufacturer?