If you imagine the external edge of a torus, all the way around, or you imagine a uniform cylinder where you then bend the vertical edge in uniformly to create a circle - that is what I'm trying to achieve. A curved circle with specific measurements.
Specifically, I want it to be 4 units high (easy) with the swell of the curve precisely one unit thick. In other words, say the bottom of the curve is at 0.00, then the widest point of the swell is at 1.00 before coming back in again to 0.00 at the top of the curve.
I imagine this could be done by trimming down a torus, but the "exterior/interior" radii settings on the Torus Dimensions don't appear to be accurate enough for my purposes - because the Torus inner edge swells in too, and I can't therefore use that to measure because I don't know the degree of that swell.
I imagine this could be done by bending a 4-unit-high cylinder, but I don't know how to...
Any help/guidance much appreciated.