i bought a charbroil electric smoker with the thermostat dial from freds for a pretty good price i couldnt pass up. the thermostat dial worked great. maintained temp very well. well insulated and temp guage was pretty accurate. since the temp guage is at the top of the smoking chamber i was thinking of adding one down closer to the heating element in the bottom. how much difference in temp is it from the top to the bottom of the smoking chamber and is it worth the trouble to add another temp guage? thanks