Meanwhile I ordered a few new weight cells to build more units and i noticed the weight cells had suddenly a different size. Though the article image was correct the delivery was different.

Instead of a lenghth of 80 mm the delivered once had only 75 mm and also the distance in between the mounting threads  changed from 15 to 10 mm, so I re- desigend both the scale stand an also the scale dish. Now you will find two different parts of each for download on Thingiverse.