@Watermad, I just put up a post on my energy efficient setup here:
https://community.anovaculinary.com/t/apc-with-coleman-28-quarts-26-5l-cooler/
@scooter7590, I too used a Coleman cooler for my setup and had a problem with condensate building up inside the lid because it’s hollow. I can hear water slushing about inside of the lid after my first cook so I drilled a drain hole and plugged it with a rubber plug. My questions to you are, what type of expanded foam did you use? Does it allow any moisture in or does it seal perfectly? Can you share some pics please?
Cheers!