I'd give a call to Brooks Berdan (Brooks Berdan LTD) in Monrovia, Ca. Brooks is a well known analog guy who made a name modifyng Oracle 'tables until Oracle decided to update the 'table and incorporate the Berdan mods into stock units. He sells both arms.
FWIW, he's mentioned to me on a couple of occasions that he's not crazy about SME arms, but that they seem to work very well on SME tables. BTW, he likes the Graham a lot, but I believe he prefers the Triplanar to either the Graham or the SME.