@Samuel235 I'm facing the similar thing.
My extruder is BMG with 3:1 ratio. Bowden 55cm.
Printed test cube with jerk set to 600 and PA set to 0.2 through 1.0 - got very minor effect.
Previous experiments with python PA test script showed effect with PA set to 1.6-1.65 which made my extruder sing with forward-backward-forward rapid move on every line.
Now i think about trying to set jerk to 0 and raise acceleration, as the formula in doc is: actual_extrusion_speed = requested_extrusion_speed + (K * current_extruder_acceleration), which makes me think the jerk should be minimal while acceleration should be high.

@burtoogle Thanks!

@Phaedrux
Does not work for me
Cura 4.4.1, settings as you've specified - seam is generated in one of the corners no matter what coordinates i set.
Can you share a gcode of the cube (20x20x20) with a single perimeter with a seam in the center of one of the sides so i can modify it for my printer, please?

@Phaedrux
Yes, i tried that but Cura still places seam to the corner...

No matter what i try to set with "Choose start point..." the beginning of the line is always in the corner. Same for Cura. Does anyone know how to align Z seam to the center of the cube's side?

@Phaedrux
I tried the first one, with the python script.
Will try the second one, with the cube, but need to understand how to make Simplify3d to align seam at the center of the side, for now i can only align it to one of the corners.

One more thing still bothers me: i have not yet found the proper settings for BMG extruder (speed, acceleration, jerk) there are very different number said to be best in every topic i've read and there is nothing about it on Bondtech site. Can you point me where can i find such info please?

I have very strange results when trying to calibrate PA.
Here are the speed, acceleration and jerk settings:
M203 X15000.00 Y15000.00 Z15000.00 E6000.00
M201 X2000.00 Y2000.00 Z2000.00 E2000.00
M566 X1200.00 Y1200.00 Z1200.00 E1200.00
I'm using BMG cloned extruder (if matters) with bowden of 550 mm and ID 2 mm.
Used python script to print patterns with the following settings:
extrusion_width = 0.5 (nozzle is 0.4 actually, 0.5 is used in slicer as an extrusion width)
layer_height = 0.2
filament_diameter = 1.72 (measured with calipers)

travel_speed = 150
first_layer_speed = 15
slow_speed = 5
fast_speed = 70

I tried PA settings from 0.1 to 1.0 at first and there were no signs of PA working. Further experiments showed that noticable result is there only in range 1.5 to 1.9. But this looks insane... Or this is normal?
Also i noticed that the speed is limited to 63-65 mm/s (due to too low extruder settings possibly?).

@dc42 I'm a bit confused.
Let's say i'm measuring Z probe height initially at X0 Y0. I go through the steps 1-9 described in https://duet3d.dozuki.com/Wiki/Calibrating_a_delta_printer section "Measuring the trigger height". I read, let's say, 15.500 at that point. Repeating the steps 7-9 several times show that trigger height is consistent at X0 Y0. I put this value to config.g an do autocalibration.
After calibration i check the trigger height value at X0 Y0 and get consistent result 15.500.
But when i move, let's say, to X50 Y0 and do G30 S-1 i get 15.550. I repeat G30 S-1 several times at this point and always get 15.550. So this is consistent.
I thought that i should add this +0.05 value to G30 in the bed.g file for the corresponding point. Am i wrong?

@Danal On what plastic? I use PETG now and it is very prone to stringing. What extruder are you using? I'm on stock Anycubic one, which is not very accurate. Extruder modification is next thing to upgrade in my list after making magnetic arms.

@Veti That's interesting, but not in nearest future as it is rather complicated.