It is a 24x48 CC. The FB is 22x20. There is a flat top warming plate on the FB. It is used to warm sauce/glaze, etc. and to pre-heat splits for better ignition. The FB has a standard air vent at the bottom. I had a smaller vent put in at the top of the end to add additional air flow into the CC. There is a grilling rack in the FB and a charcoal basket. The basket holds the coal bed and splits together for better burning. From the FB to the CC is a baffle about 8" into the CC with a downward tilt to turn the heat and smoke down. From there, I have a Horizon type convection plate for heat distribution. On the far end of the CC is a 1-1/2" drain outlet. The exhaust leaves the CC just above the main grate. There is an upper grate about 10" deep.
I have (4) 1/2" threaded outlets for therms. Two are just above the lower grate at either end and two just above the upper grate in the center of the doors. On the end of the CC just above the main grate is a 1/2" threaded outlet. I have put an electrical service entrance connector (a couple of bucks at Lowe's). This is where I put my probes for the meat therm.
That's the basic layout. Blow up the pic in my avatar. It will be a little fuzzy, but you can see the therms, doors, etc. If you have any specific questions, or need any other information, just let me know.
I have had my Bell for 2 years and I love it. It heats well, draws well, and holds heat well. Craig is a great guy and will bend over backward to give you everything that you want.
I sincerely hope that your smoker turns out like you want it and that you get excellent meat from her. Joe