Hi Earl,
I've got a little bit of data for you. Unfortunately I don't have measured T-S parameters but maybe the manufacturers data might help.
This one is plans for the Coral drivers. You can pick from back loaded horns, bass reflex or sealed cabinet. Unfortunately they dont' have the 12tet1 but the 12L-70 should get you close.
This one is for your Triaxiom. According to Goodmans your box size should be 7800 cu in. With my 15" Goodmans, the enclosure is simply aperiodic loaded. When backed against the wall, you get some of the best bass I've heard out of any speaker. Its deep, extremely tight and uncolored.
Just right click on the pics and save them to your computer, then you can zoom in on them to get a closer look at the small lettering. If the Coral jpg is unreadable, drop me a PM with your email addy and I'll send you the copy I have that's readable.