The leadscrew is fairly easy, since the lathe is copying itself, not building itself. The only real issue would be the length of the screw. If it had to be in a single setup, it could only make a new screw slightly shorter than the original. By careful thread matching, it would be possible to make a longer screw.
Pieces like apron parts, etc., could be done with a milling attachment. The bed is still the big question.
Pieces like apron parts, etc., could be done with a milling attachment. The bed is still the big question.