I have been drooling over this one ever since the drawing this week. I would ask Paul if they can add a way to block off the horizontal cooking chamber and a way to open up the warmer a little more. Then when you have a small load you could just heat up the vertical. Just an idea and I am not sure if this is the model you are referring to or not. My thought was with this smoker you would have a horizontal stick burner and a vertical. To me it doesn't get any better and you save the space of having 2 separate smokers. I never really liked the warmer being on the other end. If all goes well I will be getting one of these next spring.
Custom 20x52 vertical, Texas Smokemaster, Brinkmann Mini WSM, Abe's Smokers 48" Entertainer, Electric, Insulated cabinet "project", Weber OTG