I am looking at doing a electric fridge smoker build. I have a few questions. 1. Will any fridge/freezer work? 2. Besides removing the plastic insides, do I need to do anything else to the fridge/freezer? 3. What size vent on top and what to use? 4. where to get metal racks and how to mount. 5. Right now I have a digital masterbuilt 30 electric smoker. Could I swap the control panel and heating element over to the fridge smoker? 6. If I need to buy a bigger heating element, where can I buy the heating element and controller and what size?