I had occasionally the same or similar problem and in my case it was definitely
shimmiing. The only situation this happened was when I tried to keep the nose
wheel off the ground as log as possible after touch-down. So the nose wheel
touches
the ground at relative low speed and softly.
I tried to readjust the dampener to an extend that steering during taxiing was
pretty hard but it had no effect whatsoever.
I now land the plane as usual on the main gear but immediately after touch-down
I lower the nose wheel to put it on the ground. This way I can avoid the
shimmiing.
I might try Ivor's suggestion to use Nyogel and try again. Does the dampener be
adjusted to the same settings using Nyogel ?
Kees de Bussy
PH-SBR
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