Ours is non-insinuated and we went thru 2 18lbs bag of K in 8 hours. Outside temps were in the single digits though.
I purchased a stoker this winter and have been playing around with it. I’m still trying to get the fire box sealed off so that the fan/dampers work better.
As Andy said they are a bit touchy with spiking temps but after you get to know how much coal to toss on every time it holds very steady.
With the upright racks we can get 10 racks of ribs on a tray. So theoretically you could do 40 racks at one time.
Memory impairment ... The fee prize at the bottom of every whiskey bottle