I hopefully can answer some of your questions. I bought a Micro Seiki DQ-30(?) TT because of the MA-707 tonearm that was mounted on it. Subsequently I acquired an MA-505 tonearm and no longer needed the MA-707 (which in the end could not easily be removed from the table anyway). Both the MA-707 and CF-1 had the arm tube markings and came with the additional sliding weight. If the weight is not included the arm is incomplete. To me these arms looked identical and the only difference was that the CF-1 was made out of carbon fiber. Unlike the MA-505, the MA-707/CF-1 does not allow for repeatable/on the fly VTA adjustment.
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