Scale issue with sweep function

Hello, i think i found a bug:

I try to make a pipe section with the following code:


When i adjust the parameters to be in mm, the code doesn't work anymore.


Seems like it is dependent on the absolute size of objects? Can we make it non-dimensional, for example by dividing the tolerance by the biggest dimension of the path (just a random idea..)

The code:

```
import cadquery as cq

r_pipe = 9500 #m
t_pipe = 500 #mm

pts = [
(0, 0),
(0, 8000),
(3000, 17000),
(7000, 23000),
]

path = cq.Workplane("XZ").polyline(pts)
section = cq.Workplane("XY").circle(r_pipe).circle(r_pipe-t_pipe)
sweep = section.sweep(path)
```