I Had to google it, I never noticed the wobble. I’ve got the Dan Haga Zhukov adapter and Zhukov brace adapter. It came with a replacement for the piece that snugs that up. I don’t care for the looks of the brace. But it’s not bad cheek weld wise. I’ve still not shot it....

If I snag a carbine version. I may SBR the 11” Gun in the long run.