Where I have arrived "biggest negative" point already talking about the next really for me - the attachment.
The already mentioned lock screw is carried out by the black plastic and is limited only by the
"Square" prevented behind the head and the plastic on the twist. Which meant to me that these
equal "overwrought". A proper attachment was then very tedious. ;-)
In the end everything worked and was really strong and connected.
For the price a good price / performance ratio and it does the job.