hwhatkins,
Your post exposes you as knowing little with regards to structural engineering, and also you as a bad reader. Remember that I have listened to a PCi sub and it was not my cup of tea. I like the sound of the RSW subs. Maybe that is not appropriate for me to say, this being a damn KLIPSCH forum and all. And also remember that I said a good and knowledgable structural engineer will not want to cut a hole in a cylider. Maybe you think it is some wonderful thing, good for you. I don't. My opinion. If you are going to try to find fault with people's opinions, then good luck because you will just be running around in circles.