Alright...after reading the entire thread and asking VR a couple of questions, I put one together myself and with the help of a buddy of mine, who's a welder/custom metal guy.
I followed Villa's instructions to the "T", except for two minor changes. The first one involved the top vent and the second, the suspension of the top stone.
In regards to the top vent, my buddy cut out the factory-installed vent with a plasma cutter and installed a heavy-duty metal pipe as an "adapter" for the bendable & turnable pipe that goes on top. Then I attached a 4" vent, which directs the airflow in four different directions. The two parts are removable, as you can see in the pics below.
The second minor change was the attachment/suspension of the top stone. I figured it would be nice if it were adjustable, so I can lower or raise it, depending on its temperature. I bought a 3" bolt, 5/8" in width, two metal washers, two nuts and two "washers" ( I can't remember the exact name), used in plumbing. It will hold the stone, in which I yet have to drill a 5/8" hole and line it on the inside with a piece of an old clock spring.
I ordered a Fibrament-D stone, a IR thermometer and a bag of the ceramic briquettes. The burner is a Bayou Classic Turkey Fryer, which cranks out 50,000 BTU's. I hope that's enough
Once it's all ready to go, I'll post the results.