The system is successfully used on numerous 30-50 year old tractors (e.g., MTZ 80/82). Large mechanical backlash is no obstacle; in such cases, instead of 2.5 cm accuracy, the machine will move in a ±5 cm band, which is still a huge help for most operations. We primarily recommend the system for machines with orbital steering, though users have had success with non-orbital machines that have easier steering. In such cases, we definitely recommend the Direct Drive kit with its strong and more sophisticated motor control.