OK, from what I have seen here the felt will even out the pressure of the plate glass.
Also the sides will be ground to avoid sharp edges. The light source will be 2 evenly spaced bulbs 5 feet above the glass. Azo is slow so a few test prints will be in order.
I'm happy I kept the old Azo rolls after all these years. Still good with no fog. I did not make the negatives. A photographer friend who has since passed gave me the negatives. It seems fitting that I should make good use of them.