Michael wrote:
"The biggest problem i expect could be the deviation of the
speedometer, which could be calibrated by VDO speedo service."

Hold it.  Am I learning that these speedometers can be recalibrated
internally?  I've changed the little plastic drive gears in various
non-VW vehicle transmissions, but this is the first reference I recall
that appears to indicate that maybe the speedometers can be
recalibrated internally.  I've thought about having my eyeballs
recalibrated, but that's different.

If this is possible, has anyone ever done it or know how to do it?  If
so, please tell us how.  Very interesting.
John