Hi Robert,
I have a question for you regarding your frames.
I have a downward sloping ceiling, the underside of a staircase from my 1st to 2nd floors, which is above the staircase that leads from my 1st floor to basement. I want to place three 27" x 41" posters on that downward sloping ceiling. If I were to use your frames, noting that the frames/posters would be sloping downwards at a roughly 45 degree angle, is there any chance that, over time, gravity would cause the posters to bulge outwards and/or fall out since the overlays are not very thick/solid?
Thanks.