How do pipes get their shape? Probably this is an obvious question but there are no trivial answers and although I have a strong and proven mathematical background, I never found any scientific evidence in the object pipe, hence I infer that each pipe is an one-off piece with its lights and shadows, with its own peculiarities and flaws. In these months I totally renovated my workshop and, although I still hate machines, I had to get a lathe to work more accurately on the shapes that require an high grade of symmetry, the job is completed with the usual files and sandpaper.