The Broken (Conun) drum!

the long hub story.  Thats why I cant use my beautyful fun Tenere!
These cracks appeared from the moment I had the wheel spoked newly...
So I found another good hub, got it sent, spoked in by the same person- and the same thing happened!!!!!
He says it never happened and he does a dozen wheels a day, I guess.
He says it is because the brakeshoes do not track well. But I did not ride far- i feel the unroundness of the drum immediately.
Ideas welcome...
I keep up with the news.
9 of may...someone from horizons unlimited commented that it is due to the wear of the shoes that eat away the material of the drum.
Sort of makes sense.
Yamaha discontinued the production of these drums because it is an old model.

....dunno what to do.......

.....just buy another used one making sure this time it is better...?