The Apache Automatic Blade Control laser based grade-control system automatically directs the machine's hydraulics to maintain blade elevation. For fast and accurate blade positioning, fully proportional receivers provide exact laser-beam position data and are compatible with proportional time, current and voltage valves. From the cab, users can adjust hydraulic speed and adjust accuracy from 0 to 1.50 inches in 1/10-inch increments. The system can be installed in dozers, box blades, drag scrapers and carry-all type scrapers. Estimated list price: $9,000 to $13,000.