I made that cart for that box.
The box is 13"D x 26"W x 15"H.
The table is just a piece of plywood with a recessed magnetic tray that can be raised, lowered or removed if I need to get to the lower shelf.
It hinges on 2 little slide bolts and its held in the up postion with 2 little slide bolts.
Our generator just fits on the lower shelf but I havnt secured it yet and I stll want to put a small air compressor down there and/or a jump box or charger with boost function.
The 10" tires are 800lb. capacity NO-flats the front casters are 330lbs capacity.
The whole thing was made to make our trips up north a bit easier with all the stuff in one spot that we can just wheel over to the bikes if needed.
The ORV parking area's are a bit rough with no pavement and the cart is easy enough to drag around.
I may put brakes on the tires but not until I really have a need for them.
Here is a picture of the cart before it was finished showing the small table removed.