Here's my setup. I got a Cookshack Model 15 H/S shell from a junkyard, and my son and I rebuilt it. The controller on top is a digital oven controller, and it's in an MDF box painted with high-temp BBQ paint.
We added the wheels and bottom tray. It was a really fun and rewarding project, and the food is fantastic! I've even sold three briskets to friends and such.
The whole story of the rebuild is here: