Woof Logan:
Top Dog?s stick, including his knee attack, is his expression of his Pekiti Tirsia training.
Salty Dog?s knee attack comes from the Derobio system (Baulio Pedoy) a system based upon not meeting the force. If you carefully observe him hitting , , , ahem , , , me, you will note he draws a rising defensive movement to protect the head from me and does a drift shot to the emptiness behind my stick and that his follow up follows the same principle.
My knee attack comes from my training in Inosanto Blend and can be found for example in the Siniwali pattern "the LaCoste 8 Count". I took the movement from the 8 count and used it to seek the same ulitmate target as Top Dog (the nerve outside the knee) but originating from a forehand chamber.
This is not to say that there may not be other systems with these ideas, merely to give credit to them for being the source for us.
Woof,
Crafty Dog