This pretty much the config file I use for Rover's gears. I am always changing things, so this represents one state in time. Hopefully it serves as a starting point.

config_rover_gears.ini

# generated by Slic3r 1.2.9 on Sun Aug 12 17:25:09 2018
avoid_crossing_perimeters = 1
bed_shape = 0x0,200x0,200x200,0x200
bed_temperature = 80
before_layer_gcode = 
bottom_solid_layers = 0
bridge_acceleration = 0
bridge_fan_speed = 83
bridge_flow_ratio = 1
bridge_speed = 10
brim_width = 0
complete_objects = 0
cooling = 1
default_acceleration = 0
disable_fan_first_layers = 1
dont_support_bridges = 1
duplicate_distance = 6
end_gcode = G91                                    ;relative positioning\nG1 E-1 F300                            ;retract the filament a bit before lifting the nozzle, to release some of the pressure\nG1 Z+0.5 E-5 X-20 Y-20 F4800 ;move Z up a bit and retract filament even more\nG1 X10 Y180 F3000                         ; Feed the bed forward making removal easy.\nM84                         ;steppers off\nM104 S0                     ;extruder heater off\nM140 S0                     ;heated bed heater off (if you have it)\nG90                         ;absolute positioning\n
external_fill_pattern = rectilinear
external_perimeter_extrusion_width = 0
external_perimeter_speed = 20
external_perimeters_first = 0
extra_perimeters = 1
extruder_clearance_height = 20
extruder_clearance_radius = 20
extruder_offset = 0x0
extrusion_axis = E
extrusion_multiplier = 0.86
extrusion_width = 1.2
fan_always_on = 1
fan_below_layer_time = 60
filament_colour = #393BF7
filament_diameter = 1.74
fill_angle = 45
fill_density = 50%
fill_pattern = rectilinear
first_layer_acceleration = 0
first_layer_bed_temperature = 80
first_layer_extrusion_width = 0
first_layer_height = 0.6
first_layer_speed = 50%
first_layer_temperature = 205
gap_fill_speed = 20
gcode_arcs = 0
gcode_comments = 0
gcode_flavor = reprap
infill_acceleration = 0
infill_every_layers = 1
infill_extruder = 1
infill_extrusion_width = 0
infill_first = 0
infill_only_where_needed = 0
infill_overlap = 55%
infill_speed = 20
interface_shells = 0
layer_gcode = 
layer_height = 0.2
max_fan_speed = 100
max_print_speed = 80
max_volumetric_speed = 0
min_fan_speed = 88
min_print_speed = 2
min_skirt_length = 0
notes = 
nozzle_diameter = 1.2
octoprint_apikey = 
octoprint_host = 
only_retract_when_crossing_perimeters = 1
ooze_prevention = 0
output_filename_format = [input_filename_base].gcode
overhangs = 1
perimeter_acceleration = 0
perimeter_extruder = 1
perimeter_extrusion_width = 0
perimeter_speed = 20
perimeters = 2
post_process = 
pressure_advance = 0
raft_layers = 0
resolution = 0
retract_before_travel = 2
retract_layer_change = 0
retract_length = 1.2
retract_length_toolchange = 10
retract_lift = 0
retract_restart_extra = 0
retract_restart_extra_toolchange = 0
retract_speed = 40
seam_position = nearest
skirt_distance = 6
skirt_height = 1
skirts = 0
slowdown_below_layer_time = 5
small_perimeter_speed = 10
solid_infill_below_area = 70
solid_infill_every_layers = 0
solid_infill_extruder = 1
solid_infill_extrusion_width = 0
solid_infill_speed = 10
spiral_vase = 0
standby_temperature_delta = -5
start_gcode = M140 S80; Set bed to start heating and continue\nM104 S205 ; heat nozzle\nM190 S80 ;heat bed\nG21        ;metric values\nG90        ;absolute positioning\nM82        ;set extruder to absolute mode\nM107       ;start with the fan off\nG28 X0 Y0  ;move X/Y to min endstops\nG28 Z0     ;move Z to min endstops\nG1 Z15.0 F100 ;move the platform down 15mm\nG92 E0                  ;zero the extruded length\nG1 F200 E3              ;extrude 3mm of feed stock\nG92 E0                  ;zero the extruded length again\nG1 F90\n;Put printing message on LCD screen\nM117 Printing...
support_material = 0
support_material_angle = 0
support_material_contact_distance = 0.2
support_material_enforce_layers = 0
support_material_extruder = 1
support_material_extrusion_width = 0
support_material_interface_extruder = 1
support_material_interface_layers = 3
support_material_interface_spacing = 0
support_material_interface_speed = 100%
support_material_pattern = pillars
support_material_spacing = 2.5
support_material_speed = 10
support_material_threshold = 60
temperature = 205
thin_walls = 1
threads = 2
toolchange_gcode = 
top_infill_extrusion_width = 0
top_solid_infill_speed = 15
top_solid_layers = 3
travel_speed = 80
use_firmware_retraction = 0
use_relative_e_distances = 0
use_volumetric_e = 0
vibration_limit = 0
wipe = 0
xy_size_compensation = 0
z_offset = 0