Mark,
I fired it up and put some ribs and chicken breasts on yesterday. I tried it with the clay saucer in the water pan. Everything seemed under control and I went in to watch a little TV, fell asleep and when I woke up my temp was up to 341, the ribs and chicken were done and a little on the dry side. The upside of this is I can tell everyone how to smoke chicken breasts and get crispy skin.
I made smoked chicken salad out of the chicken breasts, it was really good and I'd highly recommend trying it if you like chicken salad, the smoke really adds to it.
This morning, after tweaking the mid section and lid, I fired it up again. The lid still leaks a lot of smoke but seemed better. I used a full load of lump and a full water pan. I don't have a clue as to the brand of my chimney but it appears to be smaller than a weber. I filled it almost to the top and waited til all of it was hot and applied it like Glenn W said he does. I followed Glenn's instructions on cutting the dampers back and the temp went on up to 250, which is what I was shooting for and stayed there all day. I never had a minutes trouble and hope it wasn't just beginners luck. I have quite a bit of experience using an old offset but it only has one damper and it moves about 6 inches, so it's not as picky as the 3 small dampers on the WSM.
Today's smoke was a butt and a hunk of chuck, both turned out great and I owe it to this forum the chuck turned out at all. I checked the forum to see what internal temp I should cook the chuck too and found out most people foil the chuck around 165 and finish it off by feel, not necessarily temp. I was already at 185, so I foiled it and finally about 210 it felt right to me. Even though I've been smoking meat for years I only recently bought a thermometer. Little did I realize how handy that thing is for me to tell how tender meat is when I stick it in there.
I really enjoyed using my new smoker today. I watched it pretty closely but found I didn't have to watch it at all today, it held the temp solid as a rock.