I am new to this forum and love the threads! I am ready for a double rifle build but lack the skill and knowledge. Does anyone know of a gunsmith who does double rifle conversions in true Nitro Express cartridges (470NE, 500NE, 450NE, 465NE, etc.). I have only seen one person on "You Tube" Jim White of J. White Gunsmithing in Maine who does conversions. Is he any good? Really would appreciate any help! Thanks.