The orientation of the part is set so that the non-tapered end is resting on the build-plate to avoid the use of supports.

Layer height: 0.2mm

Infill: 20-30%

I have tried 10 and 30% infill and the result was that 10% infill allows the part to flex too much and 30% got the part to the rigidity I wanted. I surmise that 20% infill and up will do just fine.

Material: Hatchbox ABS