I recently was given two pairs of speaker enclosures that come from a prototype line of speakers that a high end manufacturer produces. I have two bookshelf enclosures, and two tower enclosures. I have the parts express main catalog, and looking through it, it does not seem like such an easy thing to do, to find the right drivers to fill these enclosures. They are nicely made, and finished except for the hardware. I have read some, and have now come to the understanding that you make the enclosure around the speaker, and not the other way around. So.. How do I take advantage of my friends generosity? Is this a hellish nightmare waiting to happen? Or rather, more trouble than its worth? If there is anything you guys can do to help me, I would greatly appreciate it. Can I get you guys measurements on everything I have and you guys can give me suggestions maybe?