Practice on edge, actual cut is on the wrist or arms, but can't practice it safely with people that level. Also, blade metal was cheap and had a tendency to crack and capture sword blade, leading to sequences for a disarm.
DIJ - I'll give you the same invitation that Charles Daniel did when you went into a rant about him. You're welcome to come by my dojo in Atlanta anytime. talk is cheap.
I'm done here.