Being a charcoal/propane smoker I doubt it has any insulation. This can be a concern for an electric smoker. A 1500 watt element (pretty much the max for 120 VAC operation) can only put out so much heat without some help from insulation to keep it in. With gas there are far more BTU's available to power thru heat robbing cold and wind. This making the dual fuel probably not the best donor body for conversion.
An option might be to convert to a digitally controled propane unit.
It has been done, here is one thread as an example
http://www.smokingmeatforums.com/t/232758/digital-temp-mod
True about Gas/BTU output...However, temperatures are still difficult to control without a controller of whatever type. Your link is interesting but it seems that jonscott2124 is looking for a simplified means
of electric heater element(s) control, of which there are several, depending on budget, etc.
As for insulation factors, there are also several bullet type electric smokers on the market(One of which is a
Masterbuilt) which use no insulation and are desirable to those who choose not to use propane, natural gas, charcoal, wood, etc. for fuel.
After almost twenty years of running my 'Fridge smoker on natural gas, I have recently converted to all electric. ( Two 1,600 watt, 220 volt finstrip elements coupled to a PID controller.) One of my main reasons for this was "Flameouts" during a windy smoke session. The burners were auto spark ignition and worked well but I was still concerned about leaving burners unattended overnight on long cooks. Recently, during a severe wind storm, a large limb from one of my neighbor's trees broke loose and fell directly on my natural gas supply line, breaking it loose from my 'fridge cooker. Fortunately for me, I was right there when it happened and immediately closed the gas supply valve.
Since converting to all electric, I am more secure in knowing I can leave the cooker unattended for some time and not worry about gas associated malfunction.
Of course, as with any source of supplied energy, Things go wrong but my system is protected with circuit breakers not only in line with the heater elements but also the PID control system.
Just my take on this thread, Your Mileage May Vary.
Best Regards,
Tony