I set 4 eggs tonight, my first batch ever, in a Brinsea Mini Advance. Anyone use this device before? Anything I should watch out for from your experience? I am hoping to get something hatched from them but realize that going by the usual percentages, chance can be low. The room they are in is kind of chilly (64 degrees) but the temp on the incubator readout seems to be holding. There is no hygrometer in the unit so I wonder if I should get one.