LOL......I had told you about this before. Many of the forums I have read in the past were on the DIYaudio forum. JLH and many others have LOTS of knowledge on the SH front. I know enough to get started as far as hole placement for mids and things but have a long way to go to understand everything. BUT for me I need to build to learn. I am more of a hands on guys then learing by reading. I forget things almost as fast as I learn them.
Wish I could be more helpful but thats all I got. That replacement driver thread I posted a long time ago multiple times is very helpful. Then people like Patrick Bateman, Speaker Scott, JLH, Tom Danley, Bwaslo and countless others are very helpful in getting you to a point of which hopefully you can figure the rest out.
Believe me once you get started make a thread on DIY forum and here and there will be many people intrigued and helpful. I just hate making threads and posting my thoughts. My mind is going a million miles an hour and does not come across always as having a clue. So I try and read more about others experiences then making threads.