Damascus, I do like to have a helper to hold the gun or barrels down. Please explain to me how you measure your guns with your gauge without holding the gun down. As we say in the USA, "Give me a break." The Manson gauge, used the way I have explained many times on this forum, is a great tool and cheap. And also, in the USA, we don't respect British proof and want to know the measurements for more than nine inches of our barrels. I am not disrespecting your effort or your gauge, I just don't appreciate your disrespecting my gauge without knowing anything about it or its proper use. The "hanging" method is obsolete, but you and some other posters apparently don't know that.