I forgot to talk about slashing part. I do NOT swing the arm like in a lot of the videos, that requires a lot of space. It won't work in crowded situation. I practice using what I learn from stick fight by Blindside(Lamont Glass) here. Here is the video he did for me. It's call CASTING. which he "cast" the stick forward while swinging. This result in a much tighter swing radius, like combining forward motion and swing together.
Even for cane, I practice in narrow hallway and still can hit quite hard without the wild swing. I use the same technique with knife, I can literally slash in space as narrow as about 6" extra on each side of my body. I use the same idea of using body and shoulder rotation to add to the rotating force so I don't have to let my arm out to get a big circle.
I don't know, I am only 2 weeks into this. I just try to make use of what I learn from stick fight and kick boxing to mix into knife fighting.
I am too old to go to school, even if I really go to school, it would be stick fight fight before this. I just do the best I can and try in incorporate stuffs from kick boxing and stick fight into it.