The Z63 and G63 machine control kits for dozers and motor graders provide at least double the speed and accuracy, as compared with existing 3-D machine control systems, maximizing machine performance. The kits incorporate the company's GX-60 control box and MC-R3 machine control receiver, which is capable of tracking all current and planned satellite system signals. They also are compatible with excavator systems. Topcon Positioning Systems Inc. 925-245-8603.