Here is the KanDao Obsidian preset. Render the crop circle for each lens, then apply Improve Alignment on a calibration friendly frame.

KanDaoObsidian.grp_.zip

I just tried it... it works, only what is the gamma curve for hte Obsidian?

I am testing this right now.The default preset doesn't work so well.With the improve alignment there is a big improvement but i get black  hexagons at the top and bottom of the video.Is there a solution for this?

I had the same problem.  Perhaps the KanDao does not fully cover the top and bottom