CO2 Laser Ramptest

This is a Test Ramp for a CO2 Laser to adjust the correct focal distance of the Laser beam.
The Ramp starts at 4 mm and ends up at 18 mm, each platform has a width of 5 mm.

I was adding all Numbers on the .stl file, but could not get the right Cura settings to print them also. So I used a fine liner to write the numbers on the Ramp after printing.