NICE WORK, I guess im old fashion, still love adding those sticks. Have a Lang being built right now.
What Lang model are you purchasing and when will it be delivered? If you make your Lang as air tight as you can, as I have, you'll find they hold temperature very well and your fuel consumption will be low. For example, I cooked a 12lb turkey last week for 3.5 hours. I started with a full basket of lump charcoal and added about 5 coke can size chunks of hardwood plus a couple of handfuls of lump and maintained a temp average of 285*.