Bigger than expected (photos show the mounted together with a SLR camera), I had to repeatedly attach my OM-D E-M1, fitted with 60mm Olympus 2.8 with and without rings, "to backwards "to achieve approach the subject without the Velbon not bother me.
It adapts happily table tripod (max ultra mini D) brand (still happy!) But also on my Manfrotto tripod, subject, of course to equip the proper shoe.
The precision of movement is excellent, but claims for lack of graduations, to adapt a large diameter disk homemade to control the various levels required for the successful construction of a single image taken from a stack of views.
The ability to easily separate the carriages (lateral and longitudinal) can further ease the installation and to avoid handling errors.
In short, a very good material to recommend to lovers of macro photography, reluctant to invest a fortune in this type of accessory.