Thanks klaus,
I have 1.22.2, I could try and swap for 1.22.3. Do I need to have the recent license upgrade for this feature?
Unfortunately I have a weird set of images my client gave to me, they're equirectangular, but cropped into strips. So the voffset makes distortion worse near the top and bottom. The panos aren't a true cylindrical projection, but they want them to behave like cylindrical, they don't want any up/down motion, only horizontal panning. It's been very difficult to make them look right, some need to set as cylinders, others may need to be set as flat.