Some folks with constricting space do turn the ribbons to the outside. The preferred way, by those who tried both, is to set them is with the ribbons inward, as the rocket scientist who designed them intended.
Installing Apogee Divas w/ribbons to the outside
The orthodox way to install the Apogee Divas is with the mid/high ribbons to the inside. I have seen photos of them installed to the outside. I think this is a way you obtain a greater distance between the higher frecuency radiators (for example in a smaller room) , and so, perhaps, getting a wider image, but I have not tried it in my system. I would like that those of you who have tried it to share that experiece and tell us how it works. Thanks.