Options on the R 956 crawler excavator include different lengths of gooseneck booms, two-piece booms, and front-shovel attachments, as well as a variety of undercarriages. The cab offers ample space, air conditioning, and a color display. The cab is ergonomically designed to provide the perfect arrangement of controls and joystick for operating ease. Liebherr Construction Equipment Co. www.liebherr.us. WOC Booth C6760