I worked for a aircraft engineer he went over everything with a magnifying glass at ome point he pulled me over 1mm discrepancy over a 10tf span I had to stop him and say Mr burgess this isn't a aircraft wing it's tiling and to be fair he did let me do what I do after thatNever do work for an engineer !!!!
They think they know everything !!!!
And will drive you nuts !!!!
Seriously....if you see one coming towards you hold a sheet of graph paper..RUN !!