Fred, try REKAT first, and if they don't respond, you might try Jim March, who was at least partly in on the Sifu's development (if I remember correctly). Since he's very busy right now with fighting the tyrants in CA, search for his old threads on this subject. If you don't get anything, wait a few weeks, see what he's doing in the political forum, and then maybe contact him.
Karl
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"Celebrate the diversity of inclusive, self-esteem nurturing, multicultural weapons arts." Karl Spaulding, The Safety Guy