There are Gunsmiths and then there are guys who work on guns. He is wrong and everyone out here knows it!
I went to a so called gunsmith with a friend who had a problem with a Remington 700. This guy told him he needed all sorts of work on the receiver to make the scope lay correctly. ??????? ***? When I told this guy get new mount and rings and put it on he actually said "How long have you been working on guns?" Well my answer was I worked for Colt before entering the service and was an armorer in the service so about 50 years.
"The reply was well things changed since you did any work on guns"
Must be the same guy you got to fix your gun.