I would like to show the work I am doing on the Endoscopy fly though. I have not gotten the vtkMRMLMarkupsPlaneNode to do what I want, so you’ll seem some warts. I am hoping for your general feedback and, especially, how to fix those warts. The code itself can be found with the draft Pull Request #7165. Most places where you see TODO: in the code are places I could especially use some feedback for. Thanks!