I am still agitating about the size of incubator to buy. If you get a bigger one and then do not fill it up, say the 1588 Hovabator, but you only put 15 eggs in it, does it matter? Or if I think I wouldn't fill it up would it be better to get say the Brinsea 20 ECO which only holds 24 eggs? But of course, sometimes I might want to do more than that. I think that the 1588 Hovabator holds maybe 40. Thanks.