dugaboy1,

...appreciate the great insight...

...the art of double gun making seems like an arcane, but well-guarded practise...how would one go about learning more about how his/her double was actually made?...

...i have sdh's 'double shotgun' book, and note that safari press has a book entitled 'lock, stock and barrel' that discusses the making of english smoothbores...perhaps mcintosh's book on double rifles would also be useful...