I have a bit of a strange situation and wonder if someone has a suggestion.

I have a client that keeps a binder of all prints for quick reference. All prints, no matter what size (A, B, C & D), get printed to PDF at full size and then printed to paper to fit an 8.5 x 11 sheet. When printed to paper the lines of the C and D get printed quite lightly as they get scaled down to fit the letter size paper. I have been changing the line weight before printing/saving to PDF to .012" and that helps, but I really hate having to change sheet format and the drawing objects when I have to do this. Does anyone have any suggestions how I might get darker prints without having to go through this rigmarole?