unless everything is tweaked near perfect including filament used. some of those high speeds may prove problematic upon trying to finish a print error free. just sayin ;^)

Yup, 150mm/sec moves and 120mm/sec infill are probably on the high side, but it looks very intentional!
OTOH, the 30mm/sec perimeters are probably a bit on the conservative side.
Looks like you have a plan there, good luck.

Where do you get half size nozzles? Or does it depend on the hot end type. For my CTC Flashforge clone I can only find whole sizes of .4, .3, and .2. I have yet to see  any half sizes anywhere.

I'm using an E3D v5, which originally shipped with an 0.35mm nozzle.
http://e3d-online.com/E3D-v6/Extra-Nozzles

My stock solidoodle extruder shipped with an 0.40mm nozzle, but older models used 0.35mm.

I believe 0.40mm is slightly more tolerant of contamination than 0.35mm, and most users (including me!) would probably not see any appreciable difference in their use.

Sticking to 0.1mm increment sizes is probably the way forward.

If you're looking for different software, and want to try something a bit closer to full-on 3D CAD for free, have a look at:
* OnShape
* Autodesk Fusion 360
Both are free, reasonably well-featured constructive modellers, support assemblies, and can export to STL.
While potentially a bit daunting at first if you're not used to them, if you learn how to use these, you're pretty close to having the skills to use full-on CAD packages like Solidworks (call it a skill investment!).
I can't yet vouch for their STL export quality, but I was just saying on another thread how I've never had this issue once with a Solidworks exported STL (the creaters of OnShape have history with Solidworks).

Re walls:

I note you have your wall widths set to 0 (automatic) - perhaps consider setting these explicitly? Given you've got an 0.40mm nozzle, start with them all at the recommended 0.48mm, and adjust from there. Might also be a good opportunity to print a calibration cube (single wall) and check your extrusion is accurate.

Then when you design parts with relatively thin walls (< 2 x [perimeters] * [perimeter_extrusion_width] = 2.88mm), you should stick to a whole multiple of this setting (e.g. 0.48mm, 0.96mm, etc.).

FWIW, with my 0.35mm nozzle, I use 0.50mm perimeters, so the above whole multiples are nice numbers

Where do you get half size nozzles? Or does it depend on the hot end type. For my CTC Flashforge clone I can only find whole sizes of .4, .3, and .2. I have yet to see  any half sizes anywhere.

Re walls:

I note you have your wall widths set to 0 (automatic) - perhaps consider setting these explicitly? Given you've got an 0.40mm nozzle, start with them all at the recommended 0.48mm, and adjust from there. Might also be a good opportunity to print a calibration cube (single wall) and check your extrusion is accurate.

Then when you design parts with relatively thin walls (< 2 x [perimeters] * [perimeter_extrusion_width] = 2.88mm), you should stick to a whole multiple of this setting (e.g. 0.48mm, 0.96mm, etc.).

FWIW, with my 0.35mm nozzle, I use 0.50mm perimeters, so the above whole multiples are nice numbers

How thick are the side walls in the model?
What is your perimeter width set to?

Actually, maybe post up a couple of screen shots of your slic3r settings, the key might be hidden in there...

Thanks!

My sidewall thickness is 2.169 mm. I finally got it to work but I can't remember what I did. I think I ran the stl through netfabb basic and then via netfabb cloud. Is there any 3d modeling software worth using that will correctly make models for 3d printing so I don't run into this again?

Here are my slic3r settings. Also, if it helps, I have a DaVinci 1.0A running Repetier firmware .

Filament:

# generated by Slic3r 1.2.9 on Sun Aug 16 20:10:06 2015
bed_temperature = 110
bridge_fan_speed = 100
cooling = 1
disable_fan_first_layers = 1
extrusion_multiplier = 1
fan_always_on = 0
fan_below_layer_time = 60
filament_colour = #DDE4E3
filament_diameter = 1.75
first_layer_bed_temperature = 110
first_layer_temperature = 230
max_fan_speed = 100
min_fan_speed = 100
min_print_speed = 10
slowdown_below_layer_time = 30
temperature = 230

Print:

# generated by Slic3r 1.2.9 on Sun Aug 16 20:09:59 2015
avoid_crossing_perimeters = 0
bottom_solid_layers = 4
bridge_acceleration = 0
bridge_flow_ratio = 1
bridge_speed = 50
brim_width = 0
complete_objects = 0
default_acceleration = 0
dont_support_bridges = 1
external_fill_pattern = rectilinear
external_perimeter_extrusion_width = 0
external_perimeter_speed = 50%
external_perimeters_first = 0
extra_perimeters = 1
extruder_clearance_height = 20
extruder_clearance_radius = 20
extrusion_width = 0
fill_angle = 45
fill_density = 50%
fill_pattern = honeycomb
first_layer_acceleration = 0
first_layer_extrusion_width = 200%
first_layer_height = 0.4
first_layer_speed = 30%
gap_fill_speed = 20
gcode_comments = 0
infill_acceleration = 0
infill_every_layers = 1
infill_extruder = 1
infill_extrusion_width = 0
infill_first = 0
infill_only_where_needed = 0
infill_overlap = 15%
infill_speed = 120
interface_shells = 0
layer_height = 0.1
max_print_speed = 80
max_volumetric_speed = 0
min_skirt_length = 20
notes = 
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 = 30
perimeters = 3
post_process = 
raft_layers = 0
resolution = 0
seam_position = aligned
skirt_distance = 6
skirt_height = 1
skirts = 1
small_perimeter_speed = 5
solid_infill_below_area = 70
solid_infill_every_layers = 1
solid_infill_extruder = 1
solid_infill_extrusion_width = 0
solid_infill_speed = 50
spiral_vase = 0
standby_temperature_delta = -5
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 = 1
support_material_interface_spacing = 1
support_material_interface_speed = 100%
support_material_pattern = rectilinear
support_material_spacing = 5
support_material_speed = 50
support_material_threshold = 60
thin_walls = 1
threads = 2
top_infill_extrusion_width = 0
top_solid_infill_speed = 50
top_solid_layers = 4
travel_speed = 150
xy_size_compensation = 0

Printer:

# generated by Slic3r 0.9.9 on Thu Aug 13 01:23:44 2015
bed_size = 200,200
end_gcode = M104 S0 ; turn off temperature\nG28 X0  ; home X axis\nM84     ; disable motors
extruder_offset = 0x0
gcode_flavor = reprap
layer_gcode = 
nozzle_diameter = 0.4
print_center = 100,100
retract_before_travel = 2
retract_layer_change = 1
retract_length = 1
retract_length_toolchange = 10
retract_lift = 0
retract_restart_extra = 0
retract_restart_extra_toolchange = 0
retract_speed = 40
start_gcode = G28 ; home all axes\nG1 Z5 F5000 ; lift nozzle
toolchange_gcode = 
use_relative_e_distances = 0
vibration_limit = 0
z_offset = 0

Actually, maybe post up a couple of screen shots of your slic3r settings, the key might be hidden in there...

I have attached before and after slicing pics.

Any help is greatly appreciated! Thanks.