Am newbie, but have been lurking for a long time.
Read the entire UDS thread and built a small version, with son's help and have one question which was not really answered.
Heat rises...why not have thermometer in lid and factor in temp diff, instead of down by grille surface? Besides, with this narrow grille, wouldn't a lid version preclude problems when removing basket/cage and lower grilles?
I used 22-inch wide SS salad bowl for the top to gain height, with drafted chimney in center and tried to add pic to give ideal.
BTW, for those interested, I acquired the bowl on line from Instawares.com Amazing fast service.
Due to crappola weather here, have yet to fire it up or remove interior anti rust.