What is recommended for securing the EOS-8 waveguide to the baffle? Does it need to be air-tight? Edit: I hadn't completely unwrapped the waveguide yet. I see now that it has four holes for screws, and from doing some digging around in seos12 build threads it appears the gasket I thought was for the woofer is actually for the back of the waveguide. So I guess I just put the gasket on the back of it and screw it down when I'm ready for final mounting. Can someone confirm that is correct? Does the woofer not need a gasket in this case?