This is a Weber Q1200 for scale, it fits perfectly inside. The closed box provides a perfect height to act as a table. I will probably get a nice piece of bamboo to place on top to protect from splatters and provide a little more of a work surface.
Now have room for leveling blocks etc.
I may add a fence post sewer hose holder to the outside of the cargo box eventually so I can comfortably carry 20ft of it.