Getting little distortion was one goal I had with these. There is a little bit, but not as much as you might expect. Kind of wish there was just a little bit more.Is there any/much distortion upon drying since you're turning it green? Of course that may make it look like a real basket.
Black locust is among those woods with a lower tangential:radial ratio which means less distortion than a lot of common native species.
Looking at a 2 dimensional picture you can't see it, holding it in your hand it is obvious. On one that I measured, the mouth varied only 1/16" from 1 11/16" - 1 3/4".
Here's one pic looking straight down on the last form.