If you want to go rustic, prefer doing things the old-fashoned way, or want to save some money and get some good exercise, then you should consider the option of hand turning your meat. This simple tool fits into the end of our 7/8" spits (all lengths) and fastens with a small pin.
You can then manually turn your food and have complete control over the speed and positioning. If you get tired, you can always swap out to the motor and relax. This also comes in handy in case of power or equipment failure. Cheap insurance!