I have a smoker built by my dad in the day when the fridge was all metal. The smoking box has about 8,67 cubic feet of space. It currently has a 220v system with a dial connected to a capillary thermostat, and a coil element in the bottom. This is not a good control as it will vary 35-40 degrees. Would it be advisable to convert to a 110v system or stick with the 220v? (Yes, I have an outside weatherproof 220v outlet) What would you recommend for a temperature controller? Thanks for any help you can provide.