Why the grill and not a rotisserie?
That there is one fine smoker. built a few myself, am building a new one now modeled after teh ugly drum smoker (google it) only mine uses a 500 gallon drum instead of a 55 gallon. The UDS is easy to build and use, if done right you can get up to 16 hours of heat without haveing to open it up and mess with it.