[Dominik]

Yes,
the problems have been around since years. The nuts which have been used were merely a band-aid. Wheels sticking, nuts cracking, warping...

The nut issue should be solved. It's only a matter of stud length and thread (for BMW suspension cars).

Unfortunately, that is not the end of the knock-off wheel problems.

Taper angle from the wing nut and wheel also seem to be different, causing seizure.
In my opinion the thread of the nut should also be more loose to allow the nut to center in the wheel, and not on the thread causing it to seize (and brake when trying to knock off)

There are also tolerances that add up in a very non-beneficial way some time. Like centering of the adapter on the hub, and then getting clamped by the taper of the nuts.
Trying to "center" the adapter once more.

Maybe we can catch the manufacturer's attention to look into that some time...

Wheelcraft/Vintage has their own solution, allowing a lot of play between nut and hole in the wheel. Their multi PCD adapter with 10 holes is suitable for BMW, Merc, FORD and Chev (Jag). Metric PCDs and Imperial are off by a couple of tenths.

Dom