There has been a lot of discussion over the years regarding the igloo 25 quart cooler holder in the Chaparral line. I found an Engel 25 quart that fit almost perfectly. I had to remove the star-board blocks that were used to hold the igloo in place. This can be done by removing the entire holder by removing all of the perimeter screws. I then purchased some 1 inch stainless steel hold downs and a 40 inch Velcro strap. That’s about all there is to it. The Engel touches on each side, but the lid opens fine.