I have good and bad news.
Today I did the last work on the casing. The side parts are done and all edges are now smoothed. So it's ready for painting. That was the good news, now the bad one.
I tried to sold the wires on the platine. I had 10 already solded until I realized that I solded 2 wirepairs to the wrong points. As I tried to sold them of, the little metalconnection on the platine came of too.

Trying to reconnect it with solding didn't worked, so I have to buy a new platine.
Weekend is ruined at my side....