OK, this is now the final version of this one - I've added more data and dealt with a few gradients (of which there were many). Collectively this is 32 x 10 min subs in total across the left hand panels and 18 x 10 min subs in total across the right hand panels - all luminence data. I've been in discussion with another imager on SGL and he's confirmed that the region between the nose & eye of the Head is extremely populated with satellite trails - I found this early on and lost a lot of subs due to it.