Any reason why you couldn't use the electric smoker as a charcoal smoker by swapping out the bottom pan with a replacement pan from the charcoal smoker? Are they the same diameter? If not, perhaps use a cast iron pot and just putting the top cylinder directly over it? Any structural reason why it wouldn't work? Obviously, if I were to use a cast iron pot or other separate charcoal tray, I'd make sure to have some sort of heat resistant block underneath it. I'd also make sure that the bottom of the water pan had sufficient clearance. Anyone tried this? I assume that using the normal pan that comes with the unit would be risky, as it probably wasn't designed for charcoal. Or am I wrong about this?