I know it is very important to have adequate air flow, so the unborn chicks don't sufficient but how do you know you have enough before its to late? I just finished putting my "Coolabator" together and I drilled 15 - 1/4 inch ventilation holes all over it. Does anyone else have a incubator like this and if you do how many vent holes do you have in yours? Here "she" is! lol What do you all think?!? Please be gentle she is my very first venture into building an incubator! I just hope we have some success with our first batch of eggs!