For all you CAD and 3D design gurus out there if you have never heard of a Space Ball or a Space Navigator you are missing out! This nifty little gadget enables you to pan, rotate and zoom 3D models in space simultaneously. Once users get proficient using this device it is reported that productivity is increased dramatically. Many designers haven’t tried one of these because of their high price. The PE is a lower cost version and with this special on everyone using a 3D design package (3D Studio Max, Pro/Engineer, SolidWorks, CATIA, NX, etc.) should have one! Link - $37.77 FREE SHIPPING