I'll mention that while talking to someone at Clausing recently (about Atlas parts and manuals), I asked whether they still have any support for the vintage Clausing machines and was told Yes, about the same as for the vintage Atlas ones. So if you need parts for a Clausing, before trying to make them from scratch, you might call and ask for price and availability. I'm sure that the prices won't be Chinese Cheap (the Atlas prices mostly aren't), but some may be like me. Plenty of other things to do that can't be bought. And not enough hours left in which to do all of them. Also, if Clausing no longer has stock of an Atlas part and doesn't intend to make any more, they are pretty good about sending PDF copies of the original drawings if they still have them. I presume (forgot to specifically ask) that the same would be true of Clausing parts. And I can also say that if they still have parts in stock, they will not send the drawings. Which is understandable.
Robert D.