I've made my point and want to let others make theirs as well, so I will try and make this my last comment in this thread.
It is correct that the only time you should use a knife in this fashion is if you truly believe your life or someone elses life is in immediate danger and leathal force is warranted (be prepared to explain and justify it to a jury). But there are ways to use a knife that are less than leathal, and that is what the cbc (empty hand) and cbc advanced (with knife) videos teach. Specifically targeting biceps, and quadraceps, instead of necks and abdomens. And again, if people would watch his training videos, they would find that you don't need years or even months of training to use these techniques. I don't want people to think that this stuff is beyond their abilities. My best friend practices these techniques with me, he learned the 'go to' move against the most comon type of knife attack in our first practice session. Practice is important, and the more you practice the better you'll get, but these techniques are easy to learn. They are a distillation of many techniques that have been simplified and streamlined that give you only what you need and no filler. As Sal said a little bit of training from Mr. Janich goes a long way.
"The more you learn, the less you know.".
Personal preferences are needed, hence im left hand carry and my either put this knife on the inside waist band or simply in a lower pocket. Thanks all.
I'm ambidextrous and carry on my left side and right. Between the PPT and Yo2, I'd go with the Yo2 for the compression lock vs. the frame lock. I find compression locks much easier to use left handed. I've taken the clip off my Yo2 and carry it in pocket. The PPT is 4.9oz and 4.25" closed, the Yo2 is 4oz. and 4.5" closed. The Yo2 is lighter, the PPT is smaller. Hope that helps.
*btw the last part of the CBC advanced video 'mismatched leads' show how to implement all techniques shown as a leftie, or against a leftie.