I did make some rough plans for my enclosed table but I altered them so much along the way they are pretty much worthless. Here are a few thoughts and pictures that might help.
I wanted some place to store a little lump, tools and grills.
I had a whole mess of tongue & groove Cedar left over from a previous project. I made a heat barrier to go around the back of the the egg hoping that it would throw a little heat out for more comfy winter cooks, didn't do much on to help but I am glad I did it anyway, it keeps the side and back from heating up and drying out. I also put some galvanized on the floor where the dirty grids were stored. Top is just 5/8 inch Birch plywood with a piece of flagstone that I had laying around.
Hope these pics help a little and don't forget the Beer opener.
If I were to do it again I would have made it so you could just slide the egg in and out the front.