Never ending story: "MK IV strikes back" (now, without lower wishbones).
I had a quite big bearing play in the rear wheels (no, my work on the hubs was ok). The reason is that the lower wishbone has two bushes for the arm shaft:
These bushes are powder coated inside. So it is not a real good idea to put the wishbones into a oven for 24 hours in order to remove the old powder coat just to make them new because the bushes are damaged after that. Here you can see inside the rest of the old powder coat:
We made new brass bushes:
The problem is that they were made with a quite high precision but the original bushes didn't align. Now, the arm shaft doesn't pass both bushes:
I have to extend them a little bit by hand with a reamer.