Alignment is vital and rather than test Sanchin – check Alignment
Everything come sup from the ground and the Knees are vital in doing this effectively.
The next step in your Knife work — Beginner empty hand vs. knife
You have to be very careful training these….
You must take care when working on these but strangulations are highly effective.
Using your whole body in everything you do increases your effectiveness. One of the ways to work on entire body use is through the Six External harmonies so take a look and ask questions and practice.