Greetings, I've just joined the thread. I am building a set of X-LS speakers. It is my first time doing a build of this kind. I have the cases and crossovers finished but have a question as to the best way to cut up the no-rez for the bookshelf size. Of course the bottom is not covered and I intend to use fiberglass fill for the lower third but don't see how I can eek the top, sides, and back from the four pieces of no-rez. If I am correct, which area is OK to not cover more than an another? With the opportunity for new people to search for topics on the site disabled I am left to this snail way of getting information.