chutinlead
WKR
So I had to dig mine out and see how it works. If you open the lever, hold it against the head, and push on the moveable jaw on either side of the round nut, it should push out of the moveable jaw. It has a rubber o-ring holding it in place and then I was able to adjust tension.Mine is a first gen anvil, and I cannot rotate the lever more than 90°, it's solid all the way through to the other side. If I rotate the level, the other side rotates too.