PA problem, or maybe something else

[bmharon]

I am running heavily modded cr10s. KLipper over RBP, dual gear metal extruder, volcano 3 hotend with cht nozzle, 80w heater, 700W heated bed, anti backslash nuts on z lead screws, motor dampeners, adxl345, support rods, TL Smoother... to name a few.

Printer is printing fast and mostly great, but i have trouble with PA. To be precise, connection between solid layer and wall is rough and thick. Thick that sometimes nozzle grinds on layer below. On this test prints i had model thick 1.2mm and bulges on the walls are 1.7-1.9mm.

I have tuned flow, z offset, bed level, pressure advance, rotation distance, retraction, max vol flow. but whatever i do i can't get smooth top or first layer. Layer per se is smooth as a baby butt, but walls are rough.

If retraction is high whatever I put for PA doesn't change a thing. Like PA should be 2mm, because tower test from 0-1mm has nice looking corner and almost zero difference from bottom to top. Same with Ellis test. Than if i lover retraction to about 2.5mm i get PA value at about 0.46. But still walls are rough. Lowering PA doesn't change that, but everything starts to under extrude, and if going with PA above 0.6mm extruders starts to skip.
spent like 500g of fillament on tuning, but still differences are minor.

ORca slicer. Same happens if I have 2 walls or only 1 for top layer. Changing flow for top layer doesn't improve. Tried to lower acceleration for top or first layer to 500mm/s , same like with 2000mm/s. Changing speed doesn't improve also. Same with 50mm/s or with 150mm/s.
Any idea where I am mistaking?

Uploading pictures under magnifier.