im trying to setup an incubator and wanted to know what you guys thought of it. i have this old cooler

should be big enough for this year as i only have the one breeding pair. i put a heat pad on the bottom, i have it hooked up to a thermostat, then water bottles then egg crate

i got it set at around 88 is that right?
another question i have is about the container the eggs will be in. what i want to know is do you put the eggs directly on vermiculite or do i put a grate in there so the eggs sit on that above the vermiculite?
also the container the eggs go in, do i cut holes in it or is that air tight?
my girl is huge im hoping she is prego, so i gotta get this ready. any advice or input is greatly appreciated. thanks