Waste of money - bad idea benign version

The "assembly" is quick and easy in the day.
But it does not stop!

With supplied nut made of soft plastic is not even the first door opened in the "easy mode" - survived as little tensioned spring.
The part has jumped in a high arc apart.

The own improvement with nut and washer did not bring the desired success.
Now the normally holds together, but is properly closed so that no one at the door I tried it.
After the door is ajar.

So for me, the part now heads into the bin!
Pity for money!