Thanks for doing those tests!
In case anyone wants to run one but doesn’t want to make/find a grid, I made a grid SVG with varying line widths that I figured might be helpful with further tests. The lines of the grid are spaced at 1" intervals (center to center). The line widths start at 0.010" and increase by 0.010".
I don’t know what it takes to post SVGs and have the image preview actually work. Here’s the (forum modified) file…
https://community.glowforge.com/uploads/short-url/3HkT1frkQLH5XWvErS913o34MZz.svg
