01-07-11: Moonglum
Mike, the burning question is : are the changes the result of minor VTA or the change in SRA resulting from VTF? I recall someone did measurement on this and they estimated +/-3mm = +/-0.1g...
Moonglum that depends on the arm being used.
My old Graham 1.5T, which had stable balance (weight slung below the pivot) like most unipivots, used to vary VTF by a similar amount - maybe more.
With the Phantom arm, which has neutral balance, VTF isn't much effected by VTA changes.