Not yet... sorry.
I've been slammed with other stuff. I hope to do it this weekend.
I've been thinking about it a lot though... and I believe the frame is twisting with the length of the carrier basket as a lever.

If so, I may be up to selling the Tone-Hitch and replacing it with an standard bolt-on under bumper hitch.

(hint, hint: Circmand)

I'll let you know...