I have my forced air set up and regulating the temperature to 99.5 it don't seem to hold a steady temperature but fluctuates between 99.3 and 99.7 is this OK especially if it does that the whole 21 days? I am collecting eggs from one particular hen so it will take about 7 to 10 days before I set them and I want to be right before I commit them to the incubator. These chicks I will keep with my other chickens but this is a trail run for some turkey eggs I want to purchase and hatch so I want to get everything right as possible. I have 7 to 10 days to get it regulated. I am using a Hova Bator 2362N with egg turner and a fan motor.