So here's a little more video showing what we currently have working. I will publish all code happily - just got to work out Github. For now video shows the vernier sending measurements to the Processing sketch that define the diameter of each nares and the width of the septum.

If I hit the 'r' key - the processing sketch then writes a file CPAP.obj of that current object.

This file can be opened in the Makerbot software (or could be imported to Cura etc) and after scaling 10% (the Processing sketch works in pixels not mm's)

And prints in ninjaflex...

The final images of the printed cannula on the bed show the orientation that I print the cannula. Printing the cylinder in this orientation is not ideal but in fact - because it is so small iy actually prints ok without supports.