Best results with pla.

It doesn't work that well on petg. (kinda brittle)

The gcode included is sliced for my printer (not perfect). You should adjust it to yours.

DOES NOT need SUPPORT/ADHESIVE/INFILL or FILL between WALLS if you print it with 0.44mm thickness.
Top and bottom layers are optional, mine works just fine without them.

Print instructions

layer_height = 0.25
layer_height_0 = 0.2
support_enable = False
bottom_layers = 0 (add a few if not sure)
cool_fan_enabled = False
fill_perimeter_gaps = nowhere
initial_layer_line_width_factor = 100
line_width = 0.44
material_final_print_temperature = 200
material_initial_print_temperature = 210
material_print_temperature = 210
top_layers = 0 (add a few if not sure)
wall_line_count = 4
wall_line_width = 0.44 (top limit)
wall_line_width_0 = 0.44 (top limit)