Ive been in contact with Sunnen in the USA,the company that manufactures all different honing devices.They contacted there Irish agents which is where Im from and they recomended a product with the following product code P3G-P20781UA-FO7X.My question is the price they quoted was 1339 EOROS which is roughly $950.Im thinking this seems pretty steep for a simple tool which is powered by an electric drill.I first came across this tool when Iwas searching through Youtube,I saw a guy called Larry Potterfield from Midway USA using it to polish up a shotgun barrel.If anyone has any advise on this I would welcome it,I think the product there quoting me on is perhaps not the tool I saw on Youtube and maybe you guys could advise me of a different product code.Many thanks.