I got my own pressure advance feature to work, better than my JKN implementation for Marlin or the advance feature already (broken) available! It’s like christmas for me
I printed two identical test cubes: 20x20x2mm, 0,2mm layer height, 80mm/s print speed for everything, 500mm/s² accel.
On the left you can see the one without advance (k=0), on the right there is the cube with advance (k=250, I’m using integer calculations for speed). I think the pictures and the dimensional tolerance increase don’t need more words - the k=0 part has the rough top infill due to the high speed, the other one is smooth as skin!
In some days, only the ability to melt the filament of the extruder is limiting your print speed