As Wayne says, basically all you have to do is build a box. As a fairly new woodworker myself, I know that's easier said than done, but if you take your time, measure twice, cut once, etc., you should be fine.

Smaller boxes are easier to build than large ones. One alternative would be to build a pair of regular (non-tower) 2 Pi boxes to start, then build the towers while you're listening to your speakers! This would also give you a chance to practice with various tools and refine your techniques such as finishing so when you build the towers they're really beautiful.

Good luck!

• Tempest and 2 Pi Construction Pix