You guys have it correct, W. Ellis Brown is, indeed, one hell of a nice well meaning guy, and knows what he is talking about. I took a class from him in gunsmithing school, Tech College, MN, converting shotguns to double rifles, prior to his writing his book on same subject, now in 2nd edition. I strongly recommend his book, if you have interests in this sort of subject. Also, if you have interests in trying to re-regulate a double rifle, the process is clearly explained in this book too. I have converted several shotguns to double rifles now, without a problem, so I know the process works well, if you can do the work nicessary.