Percision cutting is perhaps the hardest part of any DIY speaker build. I have a friend who has access to a CNC milling machine like the one below and I hope to have him make the cuts for a pair of Frugel-Horn Mk3 which use the new Fostex FE126En. I don't have the link for these free plans but I'll find it and post it later.
http://www.youtube.com/watch?v=mWnM9U9R27A