I gather from the responses, particularly JC's, that I can mount the units upside down, they lock in the same either way. I assume the Axiom logo can be reversed. I'm sure I can handle the port dust issue. The remaining question is whether or not this would result in a more realistic, coherent front soundstage for movies and/or for mulit-channel music? Related to this, with the center tweeter about 28" above the floor, should it be tilted up 10 degrees or so to point more at the listeners' ears?

Don