I didn’t want to take over the “New member introduction thread” with my questions, so I’ve started a new one.
At this point, I already have the 3D printed components. I should receive the remaining parts later this month.
One thing I was missing in the documentation was information about the material for the "polymer endplate". In the photo, “PETG 100%” was written on the endplate with a marker, so I used that material and infill.