Adding a loop cut to an object with a circular profile renders the object non-circular. This is true for any object with a circular frame e.g. plain circles, UV-spheres, cylinders, cones, etc.
Top-left is the mesh of a plain circle with Subsurf modifier applied (bottom-left). Notice how adding one additional vertex (top-right) makes the circle skewed (bottom-right).
Is there a tool/transform/way to correct the circle?
Knowing the solution to this should help solve the problem for all the aforementioned objects. I tried selecting all points and applied the To Sphere transform in vain. It didn't help.
I thought putting the vertex
r radius away from the circle's centre like the rest of the vertices will help, looks like it doesn't.