I have two questions. First, is bi-wiring really preferable and why? I tried to set up my RF3-II's that way but could not connect the double size wire to my receiver b/c of its thickness. Second, I just purchased my RF3-II's. One speaker had very tight connectors. In fact, they were so tight that they came loose internally after I was finally able to turn them. They only way to tighten them was to open the speaker from the rear which I managed to do successfully. I was able to tighten the connector to about 90% (enough to connect the speaker wire), bu tI am wondering if there is something else I can do, or if I should be concerned.