Now that you mention it, I think I remember the Group Buy in IS... I think I remembered wrongly that it was for the 2nd Gen...Yes, this is designed for the 1gen FX. A couple of IS members have them, there was a group buy 5 years ago. I gotten the contact info for the main contact person for KiDO in Taiwan. I will be contacting them to find out what options do I have and what would be the cost to rebuild or replace them in the near future.
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Still, good luck with figuring things out! It seems like a better quality coilover than my MEGAN's, and worth rebuilding!