Printed Jura E45

Hey guys,

have recently purchased a Jura Impressa E45 (used). Have at the beginning of the whole unit once core cleaned and revised brew group and grinder.
The following is my problem. The coffee is extremely watery and often I just have a small puddle in the cup because hardly anything comes out. The puck in the grounds container is very small and wet. I suspect that the grinder is not grinding enough coffee (maybe because it's worn out, but I have a hard time judging that).

Does anyone already have experience with it and knows where the fault could be?

If the grind is too low, the coffee stops being brewed.
How did you set the grinder. Normal are markings on top of the grinder.
Worn grindstones can of course also be in such an old model.

Have the grinder set again exactly as it was before. So have marked me the whole. Should be about 11 or 12 clicks before the stop.

Whether the grinder is worn I do not know because I have no comparison and do not know how to find out.

Can you even post a video in which you can see the grinder when it grinds.
Just set somewhere and link here.