I did think of this. The whole punch needs to be big enough to obscure the exact location of the dot but not so big all the information trying pass gets lost. M

I did think of this. The whole punch needs to be big enough to obscure the exact location of the dot but not so big all the information trying pass gets lost. My solution was to repeat whatever message or image multiple times on a single page in different locations. That way if the message gets whole punched it shows up in another location so everything is still readable.