Good deal. The extra holes will not be an issue as long as you can open and close them. They just give you more adjustment.
Being a still air, have you checked the temps in all four corners of the cooler? It seems still air incubators (especially larger ones) have a lot of hot and cool spots in them. As long as you're checking the temps right on top of the eggs you should be good, but maybe down the road you can add a fan to it. You can get one for around $10 and it more evenly disperses the heat which typically results in a little better hatch rates.
Keep us posted on how your hatch goes....
Being a still air, have you checked the temps in all four corners of the cooler? It seems still air incubators (especially larger ones) have a lot of hot and cool spots in them. As long as you're checking the temps right on top of the eggs you should be good, but maybe down the road you can add a fan to it. You can get one for around $10 and it more evenly disperses the heat which typically results in a little better hatch rates.
Keep us posted on how your hatch goes....