I think you misunderstood. I will have the lugs, dropouts, BB shell and some plugs for the chain stay bridge and rear rack printed in stainless steel. The tubing is Columbus xcr stainless. From the picture below, you can see the internal sockets I'd like to use on the rear dropouts in a fishmouth design.

repachage pointed out aligning the cut end of the stays could be difficult to match the dropout sockets. But I can virtually "unroll" the stay ends to a 2D pattern. That 2D pattern can then be printed on paper or a thin film. I can use that as a template for the uncut tubing end.

10_Gregario_Rear_Dropouts by iabisdb, on Flickr