newbie here, but a lurker for along time. hopefully will have a few cluthes for the first time and i have a few questions on incubators. i finally found a nice small coke fridge with a glass door to build my first incubator. i've been doing a lot of browsing on these incubators and have some questions. on almost all the ones i have seen have the heat tape in the back of the fridge. does it need to be? or can i have it going down both sides and the bottom or is this overkill. water bottles? are they really needed, i get what there for,but does it really take that long for the fridge to come back up to temp. and even if it take say 20minutes, will it have a drastic impact on the eggs and their hatching. Fan? does it go on top and does it run 24/7 or are they run on a timer. will try and post pics of my build once start it and finish it when i learn how to post pics. lol . i'm not that tech savy. thanks in advance to all.

Jim