I bought the Berlebach LEVELLING ADAPTER 33° Ø 100 MM/4 ". My first impression is that it is very well made, and that the ball is very big (100mm Ø). It fits nicely on my Gitzo 5532 LS. The head has a separate friction control screw. The big ball makes it easy to position even with a heavy load like the D800 with battery pack and a 500/4 AFS VR lens. It is much bigger than the Burzynski head, but lacks the ability to pan. When I have gained more experience with the head, I will post a longer "review".