XYZ axes are fixed. The lower thick sheet is in it place. One of the X axes fixing bolt and nut break out from the plastic and one of the Z axes clamp gluing were unsuccessful, after I tried to separate the X axes from the Z axes motor holder. Because it had stuck together, when I was glueing the z axes clamps.
So watch out when you gluing the Z axes clamps.
However, I think I will able to fix it with a washer.
Well, this part can be the first piece, what I will print out for replace the broken one. ;)