Bryan,
  Another condolence from another "club member', mine collapsed at the Redmond Races several years ago in similiar circumstances.. Double wow !!  The old style nose gear GM14 had failed, replaced with the oleo type.. When servicing the oleo, would second Skips comment about working all the bubbles out, a very lengthly  process with my old style oleo, anyway.. WIth mine you can hear the sound of a bubble as you move the wheel from side to side, going thru an orifice.  This, Lancairs' Decker said, is the antishimming device in the oleo, a bubble is a shimmy and they are cumulative to the rest of the mount... I offer this message reluctantly,  with the hope it is of some value to others as well.. I  comeasurate with your grief...  Don Skeele  N320J  
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> >   " My only thought is that somehow a bubble may have remained somewhere inside the strut after you serviced it and eventually worked itself to where it allowed the shimmy.  It sounds like you were very thorough though, so I'll be very interested to see if a cause can be determined by tearing down the strut.  Please let us know if you're able to determine a cause."
>    Skip Slater
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