My thanks to all of you for your response and opinions. I now have all the required components and I'm in the process of creating CAD construction drawings from measurements taken from a friends L100's. Since he doesn't want to remove any of the drivers from his speakers, I have the following additional questions that I hope someone can help me with. 1) Is the front panel (baffle) 3/4" or 1" thick? 2) What is the depth of the enclosure tube that is behind the midrange driver? And 3) Are the wires to the midrange driver sealed where they pass thru the wall of the enclosure tube?

Your response will be greatly appreciated.