Thanks guys.
Knew they were built like tanks. Cost is I can buy 2 or 3 of the other lesser models for same price as one.
Ice keeping was a big factor. I did notice my roller Igloo top was hollow too. That spray in foam starts to expand when it hits the air. I was affraid to use that as it'll solidify only an few inches from the drilled hole. Then I have to drill lots of holes.
