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Finally getting PTEG settings tuned after a lot of experimenting but still seeing a tad under extrusion in certain spots. Would love feedback on where I can tweak further - configs below:

Hot Bed: 85 first layer / 80 after

Extruder: 230

Firmware Linear Advance: 0.8

Retract: 4.5mm (35 mm/s)

Print Speed: 25 mm/s or less

Nozzle Size: 0.4mm

Z-Lift: 0.4mm

Z-Hop: 0.03

Extruder Multipler: 0.87 (after calibrating extruder steps)

Print Diameter: Prusaslicer auto-calc'd

Bridging: Autodetect perimeters disabled for 3D Benchy. Fan 80%, Flow 0.9

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Marlin Configuration Dump:

echo: G21 ; Units in mm (mm)

echo:; Filament settings: Disabled

echo: M200 S0 D1.75

echo:; Steps per unit:

echo: M92 X79.01 Y99.13 Z400.00 E419.83

echo:; Maximum feedrates (units/s):

echo: M203 X300.00 Y300.00 Z40.00 E200.00

echo:; Maximum Acceleration (units/s2):

echo: M201 X1000.00 Y1000.00 Z50.00 E3000.00

echo:; Acceleration (units/s2): P<print\_accel> R<retract\_accel> T<travel\_accel>

echo: M204 P100.00 R1000.00 T1000.00

echo:; Advanced: B<min\_segment\_time\_us> S<min\_feedrate> T<min\_travel\_feedrate> X<max\_x\_jerk> Y<max\_y\_jerk> Z<max\_z\_jerk> E<max\_e\_jerk>

echo: M205 B20000.00 S0.00 T0.00 X5.00 Y5.00 Z0.30 E5.00

echo:; Home offset:

echo: M206 X0.00 Y0.00 Z0.00

echo:; Auto Bed Leveling:

echo: M420 S1 Z0.00

echo: G29 W I0 J0 Z-3.37200

echo: G29 W I1 J0 Z-3.98300

echo: G29 W I2 J0 Z-4.60000

echo: G29 W I3 J0 Z-5.60100

echo: G29 W I0 J1 Z-3.56500

echo: G29 W I1 J1 Z-4.20700

echo: G29 W I2 J1 Z-4.63150

echo: G29 W I3 J1 Z-5.15600

echo: G29 W I0 J2 Z-3.78500

echo: G29 W I1 J2 Z-4.43550

echo: G29 W I2 J2 Z-4.65950

echo: G29 W I3 J2 Z-4.69250

echo: G29 W I0 J3 Z-3.86900

echo: G29 W I1 J3 Z-4.42900

echo: G29 W I2 J3 Z-4.63750

echo: G29 W I3 J3 Z-4.55150

echo:; Endstop adjustment:

echo: M666 Z0.00

echo:; PID settings:

echo: M301 P32.80 I3.20 D83.97

echo: M304 P176.01 I32.36 D638.34

echo:; Power-Loss Recovery:

echo: M413 S1

echo:; Retract: S<length> F<units/m> Z<lift>

echo: M207 S4.50 W0.00 F2100.00 Z0.03

echo:; Recover: S<length> F<units/m>

echo: M208 S0.00 W0.00 F2100.00

echo:; Auto-Retract: S=0 to disable, 1 to interpret E-only moves as retract/recover

echo: M209 S0

echo:; Z-Probe Offset (mm):

echo: M851 X0 Y0 Z-0.00

echo:; Linear Advance:

echo: M900 K0.80

echo:; Filament load/unload lengths:

echo: M603 L0.00 U100.00

echo:; Filament runout sensor:

echo: M412 S1

​

Prusaslicer Config Dump including start / end G-code:

# generated by PrusaSlicer 2.3.3 x64 on 2021-10-18 at 16:18:14 UTC

avoid_crossing_perimeters = 0

avoid_crossing_perimeters_max_detour = 0

bed_custom_model =

bed_custom_texture =

bed_shape = 0x0,250x0,250x250,0x250

bed_temperature = 80

before_layer_gcode =

between_objects_gcode =

bottom_fill_pattern = monotonic

bottom_solid_layers = 3

bottom_solid_min_thickness = 0

bridge_acceleration = 0

bridge_angle = 0

bridge_fan_speed = 80

bridge_flow_ratio = 1

bridge_speed = 15

brim_width = 0

clip_multipart_objects = 1

color_change_gcode = M600

colorprint_heights =

complete_objects = 0

cooling = 1

cooling_tube_length = 5

cooling_tube_retraction = 91.5

default_acceleration = 0

default_filament_profile =

default_print_profile =

deretract_speed = 0

disable_fan_first_layers = 3

dont_support_bridges = 1

draft_shield = 0

duplicate_distance = 6

elefant_foot_compensation = 0.2

end_filament_gcode = "; Filament-specific end gcode \n;END gcode for filament\n"

end_gcode = G1 E-1 F500 ; Retract a little\nM104 S0 ; turn off temperature\nM140 S0 ; turn off heatbed\nM107 ; turn off fan\nG1 X0 Y200 F9001 ; home X axis, present print\nM84 ; disable motors

ensure_vertical_shell_thickness = 0

external_perimeter_extrusion_width = 0

external_perimeter_speed = 25

external_perimeters_first = 0

extra_loading_move = -2

extra_perimeters = 1

extruder_clearance_height = 20

extruder_clearance_radius = 20

extruder_colour = ""

extruder_offset = 0x0

extrusion_axis = E

extrusion_multiplier = 0.87

extrusion_width = 0

fan_always_on = 0

fan_below_layer_time = 60

filament_colour = #3424B2

filament_cooling_final_speed = 3.4

filament_cooling_initial_speed = 2.2

filament_cooling_moves = 4

filament_cost = 0

filament_density = 1.27

filament_deretract_speed = 35

filament_diameter = 1.75

filament_load_time = 0

filament_loading_speed = 50

filament_loading_speed_start = 50

filament_max_volumetric_speed = 0

filament_minimal_purge_on_wipe_tower = 15

filament_notes = ""

filament_ramming_parameters = "120 100 6.6 6.8 7.2 7.6 7.9 8.2 8.7 9.4 9.9 10.0| 0.05 6.6 0.45 6.8 0.95 7.8 1.45 8.3 1.95 9.7 2.45 10 2.95 7.6 3.45 7.6 3.95 7.6 4.45 7.6 4.95 7.6"

filament_retract_before_travel = nil

filament_retract_before_wipe = nil

filament_retract_layer_change = nil

filament_retract_length = 4.5

filament_retract_lift = 0.03

filament_retract_lift_above = nil

filament_retract_lift_below = nil

filament_retract_restart_extra = nil

filament_retract_speed = 35

filament_settings_id = "Duramic PTEG"

filament_soluble = 0

filament_spool_weight = 0

filament_toolchange_delay = 0

filament_type = PET

filament_unload_time = 0

filament_unloading_speed = 90

filament_unloading_speed_start = 100

filament_vendor = (Unknown)

filament_wipe = nil

fill_angle = 45

fill_density = 15%

fill_pattern = 3dhoneycomb

first_layer_acceleration = 0

first_layer_bed_temperature = 80

first_layer_extrusion_width = 150%

first_layer_height = 0.35

first_layer_speed = 25

first_layer_temperature = 230

full_fan_speed_layer = 2

gap_fill_speed = 15

gcode_comments = 0

gcode_flavor = marlin

gcode_label_objects = 0

high_current_on_filament_swap = 0

host_type = octoprint

infill_acceleration = 0

infill_anchor = 600%

infill_anchor_max = 50

infill_every_layers = 1

infill_extruder = 1

infill_extrusion_width = 0

infill_first = 0

infill_only_where_needed = 0

infill_overlap = 25%

infill_speed = 25

interface_shells = 0

ironing = 0

ironing_flowrate = 15%

ironing_spacing = 0.1

ironing_speed = 15

ironing_type = top

layer_gcode =

layer_height = 0.167

machine_limits_usage = time_estimate_only

machine_max_acceleration_e = 10000,5000

machine_max_acceleration_extruding = 1000,1250

machine_max_acceleration_retracting = 1500,1250

machine_max_acceleration_x = 3000,3000

machine_max_acceleration_y = 3000,3000

machine_max_acceleration_z = 200,200

machine_max_feedrate_e = 120,120

machine_max_feedrate_x = 500,200

machine_max_feedrate_y = 500,200

machine_max_feedrate_z = 12,12

machine_max_jerk_e = 2.5,2.5

machine_max_jerk_x = 10,10

machine_max_jerk_y = 10,10

machine_max_jerk_z = 0.2,0.4

machine_min_extruding_rate = 0,0

machine_min_travel_rate = 0,0

max_fan_speed = 100

max_layer_height = 0

max_print_height = 265

max_print_speed = 80

max_volumetric_speed = 0

min_fan_speed = 80

min_layer_height = 0.07

min_print_speed = 10

min_skirt_length = 0

notes =

nozzle_diameter = 0.4

only_retract_when_crossing_perimeters = 1

ooze_prevention = 0

output_filename_format = [input_filename_base].gcode

overhangs = 0

parking_pos_retraction = 92

pause_print_gcode = M601

perimeter_acceleration = 0

perimeter_extruder = 1

perimeter_extrusion_width = 0

perimeter_speed = 25

perimeters = 3

physical_printer_settings_id =

post_process =

print_host =

print_settings_id = PETG

printer_model =

printer_notes =

printer_settings_id = Anycubic Vyper

printer_technology = FFF

printer_variant =

printer_vendor =

printhost_apikey =

printhost_cafile =

raft_layers = 0

remaining_times = 0

resolution = 0

retract_before_travel = 2

retract_before_wipe = 60%

retract_layer_change = 0

retract_length = 6

retract_length_toolchange = 10

retract_lift = 0.2

retract_lift_above = 0

retract_lift_below = 0

retract_restart_extra = 0

retract_restart_extra_toolchange = 0

retract_speed = 45

seam_position = aligned

silent_mode = 1

single_extruder_multi_material = 0

single_extruder_multi_material_priming = 1

skirt_distance = 10

skirt_height = 1

skirts = 3

slice_closing_radius = 0.049

slowdown_below_layer_time = 5

small_perimeter_speed = 15

solid_infill_below_area = 70

solid_infill_every_layers = 0

solid_infill_extruder = 1

solid_infill_extrusion_width = 0

solid_infill_speed = 20

spiral_vase = 0

standby_temperature_delta = -5

start_filament_gcode = "; Filament gcode\nM900 K0.8;"

start_gcode = M207 F{ retract_speed[0] * 60} S[retract_length_0] Z[retract_lift_0]\nM208 F{ deretract_speed[0] * 60} S[retract_restart_extra_0]\nM104 S[first_layer_temperature] ; set extruder temp\nM140 S[first_layer_bed_temperature] ; set bed temp\nM190 S[first_layer_bed_temperature] ; wait for bed temp\nM109 S[first_layer_temperature] ; wait for extruder temp\nM107 ;turn off fan\nG28 X0 Y0 Z0 ; home X, Y and Z axis end-stops\nG0 X0 Y0 F9000 ; Go to front\nG0 Z0.15 ; Drop to bed\nG92 E0 ; zero the extruded length\nG1 X40 E25 F500 ; Extrude 25mm of filament in a 4cm line\nG92 E0 ; zero the extruded length\nG1 E-1 F500 ; Retract a little\nG1 X80 F4000 ; Quickly wipe away from the filament line\nG1 Z0.3 ; Raise and begin printing.

support_material = 0

support_material_angle = 0

support_material_auto = 1

support_material_buildplate_only = 0

support_material_contact_distance = 0.2

support_material_enforce_layers = 0

support_material_extruder = 1

support_material_extrusion_width = 0.35

support_material_interface_contact_loops = 0

support_material_interface_extruder = 1

support_material_interface_layers = 3

support_material_interface_spacing = 0

support_material_interface_speed = 100%

support_material_pattern = rectilinear

support_material_spacing = 2.5

support_material_speed = 25

support_material_synchronize_layers = 0

support_material_threshold = 0

support_material_with_sheath = 1

support_material_xy_spacing = 50%

temperature = 230

template_custom_gcode =

thin_walls = 1

threads = 8

thumbnails =

toolchange_gcode =

top_fill_pattern = monotonic

top_infill_extrusion_width = 0

top_solid_infill_speed = 15

top_solid_layers = 3

top_solid_min_thickness = 0

travel_speed = 130

use_firmware_retraction = 1

use_relative_e_distances = 0

use_volumetric_e = 0

variable_layer_height = 1

wipe = 0

wipe_into_infill = 0

wipe_into_objects = 0

wipe_tower = 0

wipe_tower_bridging = 10

wipe_tower_no_sparse_layers = 0

wipe_tower_rotation_angle = 0

wipe_tower_width = 60

wipe_tower_x = 180

wipe_tower_y = 140

wiping_volumes_extruders = 70,70

wiping_volumes_matrix = 0

xy_size_compensation = 0

z_offset = 0