I have a wire welder and you certainly have started my cogs grinding!
I presume the ball valve on the fire box door is for combustion air regulation but can not determine what method you developed to regulate charcoal drop from the chute.
Are you adding wheels?
Edit: Looked at photos again and it looks like you just drop what you want to add to the fire down the chute and close the door on top.
Edit 2: It was in the back of my head that you were the owner of the famous refrigerater smoker with the nice and neat controller. Did you inadvertantly tie us to the homemade woodburner or are you branching out?
i still like your set up its simple and looks good!!! i want a smoker made out of a fridge, or if i can find an old pop machine, that would work too. have the smoke stack comming out from where the pop dispenses. you could lock it down so no one could open it up and mess with your temp. imagine the insulating capibilities, it keeps pop cold at 40* when its 110* outside, imagine if that were reversed.
that other guy had too much time on his hands, i wish i had too much time on my hands.