Who, of course, the screws attracts inappropriate firmly with a torque wrench, which is your own fault.
The operating instructions from German ago understandable, but yet so many concept actually has a different meaning. One can understand but.
(!) But now on a defect which was present in both purchased cranes / is and actually had occasion to return to give: The two tie rods behind are too short for both cranes at least 10mm !!! The crane could therefore only be mounted so that the footplate at the crane base could not be screwed resting. The plate is so inclined.
The BG would get "stomach cramps". Since we will use both cranes only twice while each crane then has to carry only 100 kg, we can live with it. The price is cheaper than just a special design for the two cases.
Would I but a BMW 6-cylinder lift it? I do not think so.
If the supplier will stop the shortage, there is nothing against the gelegendliche use. The course you have to exercise extra caution is naturally limited.