If you IWB your knife with the belt over the clip, be sure to practice like a demon pulling it free and flicking it open until you can get it right out via pure reflex. Nothing worse than pulling on your knife for a dry fire as you're getting attacked because you rolled the knife the wrong way
unless you drop it trying to get it open because your grasp of your knife as you drew it from such a clumsy spot with only a thumb and forefinger grip until it's fully deployed was the suck instead.
I just tried the IWB as described above and I have serious issues with it because 1) the top of the knife still shows anyway unless you blouse the bottom of your shirt and look like a putz, 2) you can only get your fingers on the top 1/2-3/4 inch of the knife from the front and rear edges and that's not exactly a strong drawing or combat-effective grip, and 3) the whole rolling thing mentioned above. I had rolled it twice the wrong way in 10 presentations and was stuck with a kubaton when I was expecting a shanking stick. Not good.
That said, I'm sure it can work. Just practice a lot before you get too froggy out there.
With my key pocket extension idea you still have room to get your hand around the knife really well as you draw it by sliding the thumb behind the knife inside the pocket and cupping the knife with your fingers to help the draw as you present it. The pocket hangs flat so you know where the knife is and it's orientation with each presentation and can practice from sitting, etc to see what's what yourself.
And you don't have a bloused shirt bottom like a raggedy looking putz. Don't forget not looking like a putz. Important stuff there when working a new job.
