Bobcat receivers for laser-guided grading have been improved through a partnership with Trimble. Receivers can be used with box blade or grader attachments. Changes in grade can be made from inside the cab, up to two inches in either direction. A proportional system provides three speed ranges that allow operator to raise and lower the blade quickly or slowly. The receiver's photo cell has been lengthened, which allows the attachment to travel farther up or down without losing signal.