I use a thin sharpie to quickly draw lines on the template over my notebook.
Leaves a grid on the paper when removed.
You will need to rotate the stl file 180 before slicing.
Included the OpenSCAD file I used to create it.
If you modify, it does take a long time to render, but it does render.
The author marked this model as their own original creation. Imported from Thingiverse.