I took a few more pictures to help show it better. I have to say that I use the smoker pretty much every weekend and this cart has worked out terrific. My wife is pretty smart!
We attached it to the cart by screwing the wheels in below the top shelf and used a washer on the under side of the shelf. It is rock solid and the sides of the smoker sit above the shelf alltogether. No door swing issues either! I really dont think the extra 8" of your #3 model will be a problem for you..
Have since added a plastic tote to store foil, paper towels, gloves and such and keep stuff dry in the event of rain.
EDIT: When my wife assembled this thing (it was a surprise gift) she actually put the shorter middle shelf on top, and the taller top shelf in the middle. Easy to do, but will make a difference in the door swing!Edited by bigbirdk - 4/1/14 at 3:18pm