my father gave me 2 non operational fridges 1 standard size and 1 mini fridge i would like to convert them into incubators as i have heard some ppl do... my first thought is to gut the wires and drill a hole in the back of the bottom shelf and put a heater in or something to heat it....then add a thermostat. can you recommend a way/type of heater? how would you recommend maintaining humidity? and any ideas on how to make my own turners? ideas welcome thank you!!