Printer: Wanhao Duplicator i3 v2
Mods: Glass Bed, Z-Axis couplings, Z-Axis brace, Micro-Swiss All Metal Hot End
Filament: PETG

Simplify 3D settings:
Extruder
Nozzle Diameter: .4mm
Extrusion Multiplier: .9
Excursion Width: .3mm
Retraction Distance: 1.00mm
Retraction Speed: 2100 mm/min

Layer
Primary Layer Height .2mm
Top Solid Layers: 5
Bottom Solid Layers: 5
Outline/Perimeter Shells: 2
Outline Direction: Inside-Out
First Layer Height: 90%
First Layer Width: 100%
First Layer Speed: 50%

Infill:
Internal: Triangular
External; Rectilinear
Fill Percentage: 20%
Outline Overlap: 20%
Infill Extrusion Width: 105%
Minimum Infill Length: 5.00mm
Combine Infill Every 1 layers

Temperature
Extruder Temp 260C
Bed Temp 55C

Speeds
Speed: 1200 mm/min
Outline Underspeed: 60%
Solid Infill Underspeed: 80%
Support Structure Underspeed: 8-%
X/Y axis: 6000 mm/min
Z axis: 600 mm/min

I used Netfabb basic free online to fix the models. Its happening on several different models.

Pictures: