Whenever I meet up with the crew I learn something new
When Erik cut off the sunshade of the 10.5DX he told me whilst I was shooting to make two images, one in landscape and one in portrait orientation and get a full image circle.
All I needed to do is learn from Chris that there is a Photomerge function in PS
Now I have another circular fish-eye, the trick is just to make two images. You do need to be careful when taking the two images though, not to change the perspective too much between images