 With the smooth ride of the HVSS, it gained the nickname "Easy Eight" from its experimental "E8" designation.The M4 and M4A3 105 mm-armed tanks, as well as the M4A1 and M4A2 76 mm-armed tanks, were also eventually equipped with HVSS.Both the Americans and the British developed a wide array of special attachments for the Sherman, although few saw combat, remaining experimental.