Thank you all for responding, your input made me even more determined to finish my DIIIs.
I have done a lot of reading the last few days and learned that I need to learn even more.
I believe now that I understand, to some degree, that the enclosures volume and the drives determine the frequency I will need from the enclosure. I will adjust the enclosures fb by porting. In the DIII case 40hz is optimal but its tuned to 36.75.
I am going to continue to read and learn more as I build. I have lost track of all the website I have gone to, many of which have great information. If you know any which will help me learn all the terminology and formulas associated with them I would enjoy reading it.

Preedy,
I would used Wayne's design, but Email Wanye and ask what crossover changes would need to happen to use the sheilded woofers. Wanye is a real nice guy that is quick to respond to Email's. He might even already know what needs to change.

These speakers sound awsome, i wouldn't start mix matching diffrent designs, especially if its your first attempt.

I'd start by asking Wayne what need to be done to make the DIII's shielded.

I have built the DIII's and they are pretty good . They have a wonderful range and very clear mids and highs. However, for about the same amount of money you can build the Lyras. I think the Lyras are even better with a great sealed box bass sound and very clear mids and highs. Take a look at the Lyra design it is a true 3 way. I really like them better after building both speakers.

if cost was no object, would you build the the Eros?