Have you contacted Omega? The gentlemen I spoke with (Les I believe) was very cool to chat with.
On a side note, when I had my full range speakers they sounded way better on the short wall (my room is 11x14x8) and the back of the speaker about 15" from the wall and I was sitting about 9' from the face. That placement worked for the Mark Audio Pensil clones and the Audio Nirvana 2.8MKii big ports I built.