ThermoSTAT, as in control the temp, or thermoMETER, as in read the temperature?
Digital thermometers are probably the best way to measure temps, apart from a temp gun.
If it's a digital thermostat, I don't see why you have a problem managing the temps, it should control the output of the heat mat.
There's more than one way to make an incubator in that thread, did you read it all?
The fluctuation in temp shouldn't be too bad, just may take a little longer to hatch, temps rise and dip in the wild, don't they
The only thing I would be concerned about, is leaving them on the heat mat without a thermostat, when you go to sleep, as you won't know the temps then. We had a mini heat wave over here in 2006 and the temp in my incubators hit the low 90s, for just under a week, so when my corn eggs hatched I had about 50% of the babies hatch with really bad spinal kinks and they had to be euthanised
