Adjusting Screw (501R,501F,511,532,550,561,590)
  501R    Prior to #M/P1004775 except between
          #M959920-M960169. Starting with
          #M/P1004775 and between #M959920-M960169
          see 6110580
  501F    Prior to #M/P1004775 except between
          #M960170-M960319 and #M996400-M996574.
          Starting with #M/P1004775 and between
          #M960170-M960319 and #M996400-M996574
          see 6110580
  511     Prior to #M1004775 except between
          #M964470-M964769. Starting with
          #M1004775 and between #M964470-M964769
          see 6110580
  532     Prior to #M/P1004775 except between
          #M964770-M965069 & #M990700-M990999.
          Starting with #M/P1004775 and between
          #M964770-M965069 & #M990700-M990999 see
          6110580
  550     Prior to #M/P1004775 except between
          #M964070-M964469 & #M984750-M985149.
          Starting with #M/P1004775 and between
          #M964070-M964469 & #M984750-M985149 see
          6110580
  561     Prior to #M/P1004775 except between
          #M965470-M965869. Starting with
          #M/P1004775 and between #M965470-M965869
          see 6110580
  590     Prior to #M1004775 except between
          #M965870-M966269.  Starting with
          #M1004775 and between #M965870-
          M966269 see 6110580