I think I may be safe on the wiring. The Smoke Hollow does not have temp controls on the top like the MasterBuilt, the heating element sits at the bottom and an external Rheostat plugs directly into it from the right side of the smoker. I will contact the manufacturer just to be safe though.
Not seeing an air inlet anywhere on the bottom. There are a couple of small holes to hang a drip pan from but other than that and the small hole i drilled to accommodate the wire for my meat probe there is not much for air to come through.
I'll have to check on the wattage. Yes it is insulated and it does hold up heat pretty well even in sub 30 degree temps. The Rheostat has Low Medium High settings and the indicator light will go off and back on from time to time leading me to believe that it is not "constant" heating element. I have to open the unit in order to change out wood. So far that has not been as problem as both times I have smoked the chips on the top were not charred at all. But I eventually would like to mod it so I have a pull out side loading wood box\water pan. This all may be too much for me to do, I am a computer guy not a welder. I may have to bite the bullet and purchase a smoker that better suites my needs.
If I were to attempt to put ni an inlet in the bottom how big would I want to go? My smokers dimensions are 30â€ x 16â€ x 14â€ which is fairly close to the Masterbuilt, so I have read.