Finally got the Swamp Donkey installed with the premium roof. It will indeed fit. However, the clamps have to be mounted into the unit at certain spots to avoid the roof clamps. It’s not a problem at all, it’s just easier to mount with the roof on so you know exactly where the clamps would interfere. Also, the clamps for the front rail will have a bit of space from the screw to the box, but Swamp Donkey includes two black spacers that can be used in that gap between the screw and the unit. I will include pictures of what I mean. The first picture is not using the spacer, and the second is using it.