I'm, really happy with my CG SP and with a few easy mods it will do a
really nice job with barbecue. With the warming shelf, it will do six
full racks of spares, with a little bit of room left over depending on
the size of the racks.

If you want to build a UDS (Ugly Drum Smoker) go to

http://www.smokingmeatforums.com

and find the SEARCH button in the top third of the screen and use
"drum smoker" as you search parameters. There are several there that
build them and you can get great tips on vent sizes, materials, and
design notes. They are posting some pretty amazing stories of their
results, and some of the units are really easy on the eyes, too.

Robert