I was wondering why put the smoker is on legs at all. Why not put directly on the trailer. It looks like the center of gravity will be quite high. That things going to want to roll when you go around corners which will put much more torsional stress on the tongue and the hitch.
Originally i had plan on keeping the wheel and tire combo so i had to add the legs on the tank to give the fire box about 6" of ground clearance, now i'm having second thoughts. I should of just added taller tires.