I have a 22.5" kettle. I laid out the snake and picked up a rack at Lowe's for use. The snake worked very well. I need to play with the vents to really get it dialed in but it stayed around 250 for 5.5 hours. While good, I think I did a few things wrong. First they were slightly oversmoked. I will definitely cut back on the amount of wood I add to the snake. Second, I didn't wrap the ribs at the 3 hour mark and I think I will try that next time. I also think I would like the temp closer to 275.
All in all, they were very tasty but not as tender as I would have liked. Everyone else raved about them, and I can't wait to try it again.