I will be hosting Lloyd de Jongh of Tripwire Knife in Los Angeles April 21-22. The details (location, exact price, etc) are being worked out. Here is his description of what he will be doing in the Chicago on the preceding weekend (April 14-15) and part of a symposium in the Bay Area on April 28"
"I will be contrasting the Piper System with the Tripwire System movement and methods. Content will be an analysis of criminal use of the blade from a South African perspective, assault and ambush to counter-assault and counter-ambush interventions, fighting back from structural disadvantage/behind the attack curve, prison and street-style assassination, street assault and non-Western movement vs conventional technique and expectations. This video is from ~2009, it showcases Piper System movement and the empty hand "Form Style". It is from my older generation of material but may be illuminating:
https://www.dropbox.com/s/2s1wmmlrvtlia3s/Lloyd - Piper Demo + HoF.mp4?dl=0