Production error on the rail. Maximum as Ausprobierspielzeug

Plus point:
- Cheap
- For little money you can try a slider to know what was later times of a "real" Slider wishes (eg really smooth rail, motor operation for soft handling touch without using hands) to

Minus point:
- Rail has upped a notch, thus it makes at the point of course a jolt. Perhaps we could grind this place, but frankly this is a (smaller but) critical production error with which one does the slider should not have to deliver (even less, if you look at "Pro" ranschreibt).
- Total no commercial tires buttery trips possible. If you in the mail has the ability to image stabilizer can's look quite cool, but the slider only runs for too restless.