Puff got most of them. The only thing I would add is that you are not going to have great luck burning all wood in the small firebox of a chargriller. It can be done but I think they are really to small and will run better using other methods.
This means that you need make a charcoal basket and get familiar with the Minion Method. I made a charcaol basket from a shaker basket found at Lowes.
Here is the thread:
http://www.bbq-4-u.com/forum/viewtopic. ... ght=shaker
The next thing is to go to great lengths to control the airflow into the firebox. Once you have the temps where you want them, oxygen becomes your enemy unless you can control it.
Put a screw in every empty screw hole you find anywhere on the smoker. You want as little air getting into the firebox as possibe unless you are the one letting it in.
I am not saying that it will happen to you but I had air feeding the fire from around the lid on the cook chamber. I sealed it up as best I could with a couple of mods. You can also use a bit of foil for stopping airflow.
Here are all the other mods I did on mine.
http://www.bbq-4-u.com/forum/viewtopic. ... riller+mod