At all three fit, the screw challenges in the first uses of by doubts - to break the cable release from the thread fear but passes by with a little routine.
The jacket is made of a smooth plastic and can, for example, for a outdoor use, easy to clean.
The locking function proven to exposure times> 5 seconds, only the release of the locking should be previously practiced a little.
40cm are incidentally not long! One should therefore first be aware of the dimensions - for me it is perfectly adequate and fits without risk of buckling in the photo backpack or tripod bag.
