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Review.
Well you have got this far so I thought I might throw in some stuff on Knife fighting.
I thought you might be interested in this video on defence against a knife attack.
(ps I dont know this guy, i do not get any kick back from this guy).
A word of warning, any defence against a knife attack may fail because of the actual speed that someone could attack with. Certainly number one priority is controlling the weapon but practising this is totally different from someone that would attack you in the street with frenzy.

Tip
Grab anything to defend yourself, If you get pre warning of an attack, chair, anything that wont slow you down too much. remeber dont point your fingers at the attacker, they are an easy target for a knife.