I'll tweak the Fine Tune to one note (usually the middle C or D), but everything more than a few keys higher or lower than the note I tuned to will be out of tune, to the point that an octave up will be about a half step too sharp and an octave down will be about a half-step flat.
Would shipping it back to the factory for calibration fix my problem? If getting knocked around in shipping contributes to the issue, I worry whether shipping it across the country (I'm located in Portland, OR) and back would lead it to arrive back in roughly the same condition as now: usable as long as I stick within a range of 4-5 keys.
Do you guys have any suggestions?
(Edit to add: I bought my Voyager used about five months ago, it's been this way since I got it.)