I took the designs from a tank build and modified the hell out of it (I did not build this though).
20" dia x 36" wide cooking chamber with (3) 18" × 36" cooking grates. Almost 2000 sq/inches of cooking space.
The firebox is 14" dia x 24" long vertical draft with dual outlets and a pull out ash pan; the firebox includes a port and valve for a BBQ Guru and a large pull out basket that can hold over 25 lbs of charcoal.
This baby is on his way here, hopefully I'll be able to compete with it.