I wanted to give feedback!
My Layerlines really came from Extruder Gear slip.
As suggested I put 3xM3 washers between the acrylic piece and the heatblock.
This solved my issue almost completely. I‘m now fine running an E Step value of 250 with no problem. No under or overextrusion- I’m happy to have some good quality print back.
No I will adjust the K Factor & Vibration compensation for pushing the 120mm/s speed limit
Thanks @hauke for bringing me to look closer!
