I recently upgraded my speakers to an Athena Audition series system consisting of the AS-C1, 2 AS-F2s, and 2 AS-B1s. I've been planning on buying a pair of Energy C-R1 Bi-Poles for approx $300 to use as surrounds in a 7.1 system. But then I had an idea. If I buy two pairs of the AS-B1s, which are available to me rediculously cheap, then maybe I can build two bi-pole enclosures and use the woofers and tweets from the bookshelves. I figure I can use the wood from the speakers so that they will match in appearance. Now, I have a friend who is in to carpentry, and another friend who is a cabinet maker and builds custom speaker enclosures for cars and trucks, and they have volunteered to help me build these. So my question is about what kind of concerns I should have when building a speaker. I know that a lot of you have built your own subs and many have built their own speakers and would love to hear from you on what kinds of obstacles you think I'll encounter and what kinds of mistakes I should avoid etc. Will there be any materials I will need other than what I'll have avaiable from the bookshelves? And have you heard of anyone building bi-pole speakers before or know of any websites that chronicle their construction? Finally, and most importantly, is this a task I should even bother taking on...? I love the idea of having custom bi-poles that match my system aesthetically, but of course I want them to sound as good as possible as well. I am a novice, so any help is appreciated, and thanks for reading!