My incubator is a Red Bull mini-fridge. All the components have been removed except for the lights, which I only plan on turning on when checking on my eggs. I have around 6 feet of left over 10-watt, 3" flexwatt heat tape that I was considering putting down the center of my incubator, right in between the two tubs on each shelf. I was also going to put an 80mm fan right above the heat tape so it distributes the heat. I planned on starting the 3" heat tape at the bottom of the top shelf since heat rises and the fan would give off a little heat too.

Can you guys tell me what you think and if you recommend I use 11" heat tape instead? I figured using 3" heat tape would allow my fan to blow most of the heat so it would be better distributed and even temps throughout. I am attaching some photos of the incubator from a few feet away and with the door open up close. Thanks for any advice!