if youre using two different heating elements then probably not but if youre using 11" flexwatt to heat the incubator and on the hot side of the tubs, for example, then it may work. just make sure you disable the night drop feature and put the probe of the thermostat in the egg box so that the temp you set on the thermostat will be the temp that the eggs are exposed to. also make sure you monitor the temps of the flexwatt on the hot side of the tubs with digital thermometers so that you can make sure you dont get too much temperature variance by using the thermostat to heat the incubator and the rack.

i think i could be possible but i would rather get another thermostat.