I was told the older Graham 1's and 2 series although close to the limit of the weight specified an acrylic armboard could be made custom as it was not a popular pairing and this was directly from Michell in England and that the Phantom was to heavy for either the Orbe or Gyro versions. I have seen numerous tables with a graham arm that the owner because of the arm having an SME mount have incorrectly intalled an SME arm board that is too heavy with the 1 and 2 series grahams.
Cheers
Cheers