The leftmost point of the left side of a profile will correspond to the inner surface of the ring.

After doing a few tests:
Using Bounding Box looks very useful.
Bounding Box center, adjusted by subtracting BB xLength/2 from x coordinate, gives Orient Line Line base line start point.
BB center, adjusted by adding BB zLength/ to z coordinate, gives Orient Line Line base line end point.
The start point of the ring circle, on the + x axis, will be the Orient Line Line target start point.
The start point of the ring circle, with ringWidth/2 added to the z coordinate, will be the Orient Line Line target end point.
Orient to be in the Stretch mode.
(The above math is off the cuff, and might not be perfect.)

Then do revolve.

A concave inner profile seems doubtful ...

The coding seems relatively easy, (which would mean many hours for myself :-)
Not sure about how to do .2mm width increments, except with slider...

- Brian