Sorry I didn't see this sooner, but, I was cooking on Fat Boy (posting oics tomorrow).
Yes, wheels are a snap. And, yes, a little over four is about the best your going to get out of it.
I've done the third grate, just get some right angle brackets at Home Depot or Lowes. Also added some handles to the barrel,and took one of the tool hooks and mounted into the side of the barrel. If I'm real careful, I can still get the con*** - oops, I meant tight fitting cover - onto it.
Overall, though, it has got to be one of the most versatile cookers out there . . . . . second only the the Kettle ! ! !
BD