OK, looks good, but it ain't working that well. When the food went in, it has slowly dropped the temp, and it's not recovering.
So I have put another hole in the back of the drum, this has increased airflow, and it is picking back up nicely. I'll see what it's doing in half an hour.
@ Aris. I do start it with a chimney, and use the Minion method. (you tube it, there are loads of vids to get you going, that's where I looked.) That is a tube or old can with both ends cut out. You then pile charcoal round it and put wood chunks on at the top. Iam only doing this as I don't know how much smoke it will make, so I don't want to over do it. I may add more wood in the future, and put it in in layers, so I get a more consistent smoke all the way through.
When your coals are ready in the chimney, you pour them into the tube and then remove it.
I think with a bit of luck that it won't need a top up, but if it does, I will start another chimney so it is already hot, and won't pull down the temp. You don't want too much of the smell that unlit charcoal produces, it may affect the food flavour.

Of course Iam still feeling my way with it, so I will let you know how it goes. Hope that helps.