Question: bottom most image - bedding.
I see pillar bedding? what are shiny marks perpendicular to center line, on both sides of mounting screw hole?
I usually end up with the same kinds of lines but not so defined in line with the center line after skim bedding which I do after pillar bedding.
Also, your level of precision seems a few orders of magnitude above what I am used to seeing, especially with the little things that I do.