Yes Rob, it does pay to look at all your images for transient objects
Over the years I have been on iceinspace I have seen at least half a dozen images put up by imagers who have not realized they have a supernova in their pictures.
A little while ago a comet went through which was missed by all the automated surveys and should have been seen by amateurs, like you, one day someone will look back at their images and notice the comet
Cheers