I was posting on bike forums and this video was linked. This is all so frustrating. The one I have looks like the first one shown here with the writing on it, but it slides over a large fitting on the rim and a piece in the middle turns to tighten it, but the cassette itself doesn't turn when you are tightening it and you do need a chain whip to remove it. I know cause I recently changed it. 4:44 that's the one I have.
