Seriously people, how can you reasonably well assess this part also? Have it tested due to the many positive impressions but, unfortunately I did not have the slightest idea come about like this. The cheapest chinaware sealed in plastic, the rubber pad dissolves already at every turn from the dial has so much game that one is afraid he falls away. The required Allen for the "friction adjustment" must also be get even itself. These were the first impressions out of the box ... But let's not be so, to see first how the part works. It can be reasonably well to mount on the ball head, provided this has a screw and no internal thread. A twist one seeks in vain, of course. Next you go, quick-change system is mounted on the carriage, camera top, holds. But nothing more. If you try to make an adjustment so seriously you will be quickly brought to the earth. The carriage has so much game in all directions that my setup 650d and 60mm macro (ie a macro flyweight setup) will start to bounce and bucking so such that image composition or focus be completely impossible. Ultimately remain a 2cm effectively traverse beyond the center, where the carriage runs halfway normal.
Conclusion: For the stated purpose mE completely unusable. Saves you money and buy something decent, or move your tripod. This is at least as accurate ...