i see, that changes things. but no i would not cut out floor joists without consulting a structural engineer. you may just have to sacrifice the depth of the projector or look into a normal throw projector

how does putting the projector higher up increase your picture size? why not just put it right below the joists so you get a more straight on picture? and presumably your projector is right above a couch anyway so is the additional 6 inches really going to save you anything at all?

you say early dune books, not the later ones? i’m about to read this series