I don't use a swivel blade fixture. I pinch the blades between my fingers and use my finger tips as a sort of guide against the stone. But yes, I believe the BK blade shank is different than say a Tandy for example, I'm not sure what some of the other custom or cottage industry makers use for a shank diameter.
My blade was dull enough to easily see the light reflecting off the apex or the edge. I started on a 600 grit stone, but quickly dropped down to a 220 when I realized it was going to take forever on the 600.
I then progressed up to 8000, and stropped it, I made a couple quick cuts on a scrap of leather, and went to bed. I haven't had a chance to use it since then.
I think I will be very happy with the knife now, I just mentioned it because not everyone will be willing or able to touch up a new knife. And it could very well be that I got a blade that slipped through the cracks, and all the other ones are much sharper out of the box. I'm not complaining, or unhappy, at this point I would say that I would order one again.
Like I said, I haven't had a chance to really use it long term, but from sharpening it I can tell that the steel is good enough to last awhile between stropping sessions. I have hand sharpened a lot of other knives and tools, so in comparison I'm confident that the blade steel is decent enough.