My friend has a Verney Carron side-lock shotgun double-barrel. I searched the internet for a tutorial how to install scope mount in it and then mount the scope, I couldn't find any. Any help would be appreciated. I found a thing that use a magnetic force. I don't know if its any good. http://www.dogsanddoubles.com/wp-content/uploads/2012/11/Verney_2.jpg Thanks in advance.