if you don't want to spend as much or use a tool to adjust the tilt, you can buy the one from clean's camera support
https://cleanscamerasupport.com/product/arri-wcu-mounting-bracket/
just so y'all know, i, david "clean" berryman, am indeed still making quick release bases (QRB's) as well as a variety of other camera, preston & cinetape parts. pm me or go to
http://www.cleanscamerasupport.com
thanks!
clean