Hi All,
I'm the manager of a 3D printing lab at an art school and have experience with the Ultimaker 2+, 2+ extended, 3, S3, and the S5's....
I'm having a similar issue with the Y axis black sliding blocks breaking and the axis slipping out. In my opinion this is a design flaw that the Y axis blocks are oriented upside down compared to the X axis and don't have enough plastic to support the axis.
Does anyone have any experience replacing the Axis + sliding block?