The author remixed this model.
Top sample used original posts settings - Bottom used modified settings.
The settings should transfer with the .3mf file. Biggest change I recommend is using a 0.8mm nozzle. Use the standard PETG Settings and change the following settings:
Layer Height 0,16
All Line Widths 1,0mm
1 Wall Loop
0 Top Surfaces
0 Bottom Surfaces
Top/Bottom Overlap 35%
100% Infill
Aligned Rectilinier Infill
Infill/Wall Overlap 35%
Sparse Infill direction/Solid Infill direction 0°
All Speed 20mm/s (except travel speed)
Do not overextrude like the original mentions! Use flow Calibration, mine was 0,97
Use a LOW TEMPERATURE - mine was set for first layer 5°C above minimum recommended temperature and the rest at 10°C above the minimum recommended temperature for my filament.
DISABLE ALL COOLING
Use a smooth build plate