Suggested Cura Settings
Please use Cura 5.1 or newer. It will make a difference! I used these settings, but if you have different ideas... please let me know what worked for you. If you have any questions, just shout out.
Cowling
I printed it front face down. Although I dislike using supports, I couldn't figure an orientation that was better without them. In the face down position, it only puts supports for a minimal portion. I also used 3 wall thicknesses, but most of it will be constrained to one wall thickness in the sides since it is a solid model. Total weight using ABS is 6 grams.
Side Fairings
I used the Spiralized Outer Contour mode does a really nice job. Total weight for the pair using ABS is 7 grams.
Wheels
Layer height = 0.2mm
Wall thickness = 1.2mm
Top thickness = 1.0mm
Bottom thickness = 0.0mm
Pattern = Concentric
Infill = 0%
Support = ZigZag, 10%
Adaptive Layers = checked
Adaptive layers Max Vari = 0.05
Adaptive layers variation step size = 0.01
Total weight for the (4) halves = 21 grams with the supports and after support removal is 15 grams.
Guns
I printed these vertical with Brim build plate adhesion so they wouldn't get knocked over.
Wall thickness = 0.4 mm
Top/Bottom thickness = 1mm
Infill = Cubic, 15%
Total weight for the pair is 3 grams.