Hi! im new in the forum and a student of the knife fighiting arts and knife culture.. Im from argentina ,were the Gauchos have a very important culture about the knife.. But in this case ,my interest is about a suposed Navaja fighitng method call SITRA ACHRA , i found this doing some internet researching about knife fighing methods etc.. the website is http://www.navaja.lv the curiuos is the spanish roots of this method ,but the teacher is a czech guy.. I dont know if something know anything about this art...i apreciate the data. good bye! ps: sorry if my english is bad..