Thank you for this informative answer. I had thought before reading it that the lowest common denominator was to use bleed to put this info.

I had thought that Adobe put the option to put slug on all four sides was not unintentional.

So let's see how this would work in our world. Say we put in fold marks outside the trim. If they don't touch the inside of the page trim, then they would fall off if we did not indicate slug in the document setup?

I will try your page trim trick later this a.m. I am trying to make a bulletproof workflow that doesn't rely on a human to have to touch the placed file more than required to eliminate small things from becoming big problems in the life of the document.

I have to experiment on placing these pages into other pages so that I understand its implications. Thanks for your response, sam