The smoke ring was somehwere around 3/8-1/2". I think the 4th of July butt had a smokier flavor, but this one came out fine. I figure after a few more I start to get the hang of it.
As far as the two wide coals, putting a third coal down the middle would probably be a good idea to get the temp up, but then no place to nestle the wood.
Sounds great, 458!