mcbainjj

Looks like you are right. Thanks for the help.

I unfortunately do not have a gcode for a good print. Here's a bad one though UM2E_threadExperiment.gcode

I have been printing threads quite merrily prior to installing Cura 4.5. In the picture below, you can see such a print on the right. It is strong and seems like it is completely connected to the cylinder to which it is attached. After installing Cura 4.5, my threads print only just barely in touch with the cylinder and the threads can easily be detached from it (as on the left in the figure below). I'm not sure what to do differently. When print such threads, I have "Support Overhang Angle" at 80 degrees. Can you help cure my ignorance?