I'm building an incubator next few weeks and wondering how to move the baby chicks from there egg turner tray to the bottom hatching area without a total heat loss? if you open the door on an incubator don't you loose all heat or most of the heat? would it be best two have two or three small doors? maybe not a big deal if I move chicks and shut door quickly? when they start to hatch on day (19-20) thanks I'm taking about (20) designs and making my own incubator next week. have all parts now, digital thermostat, dual fans and dual heater elements, GQF 3030 humidity bucket with humidity tray and Reserve tank, connecting hose, with quick disconnect coupling and constant level humidity pan with 2 humidity pads. Also have (4) of the 6300 egg turners. Have two digital temp/ Hygrometers for safety. I've also noticed that some have humidity tray at top, some have humidity water tray at bottom? when having humidity water tray on bottom then appears that hatching box is at top and vise versa when opposite? thanks for any input. I have a woodshop and was a machinist for 22 years, now a computer server tech and repair old stereo's, reel to reel decks, turntables in free time. have 12 chickens Delaware's and Rhode islands.