I have decided to go with a 25% overlap for this project. I am projecting onto a 40' by 18' cyc. With the 4:3 aspect ratio projectors, this actually give me a little over a foot on each projector beyond the projected space and 25% overlap. I am hoping this will work out well, especially since I will not end up with the 10k projectors that I specified...

Thanks for the input.

Best wishes,
-scot