arisberd

I developed the following scad files to fit in smaller beds. They have small changes in the shape of the eartube and in the dimensions of the spring [Stethoscope_BED150mm.zip](https://github.com/GliaX/Stethoscope/files/7150185/Stethoscope_BED150mm.zip)

Because of changing eartube's length, I suppose that acoustics may change. So, I can't prove it works as good as the original. Though, I managed to print it and use...