"Arrrrrr, grasshopper. You learn quick, but waste much time in the process"
Well I should have guessed. One of my batteries is not an official Canon battery.
It only lasted an hour.
Had another go with the Canon branded battery.
263 shots x 30 seconds. Couple more peices of space junk, nothing like the first shot though.
Better trails.
In case there is anyone reading, that is still learning and wants to know-
After stacking with "StarMax" (Free download),
I still get tiny gaps in some of the trails. Might be my shutter, because i'm using a remote on continuous mode 30 second frames.
I blew the image up, sampled the colour of the trail and filled the missed pixels, I also removed the blue and red dots using the same method.
I realised, to get a nice pointed end to the tail, finish your run of frames with some shorter ones, eg my last 3 frames were at 15 seconds.
That dims the trails and gives the effect of a pointed tail. Gives them a better resemblance to a "moving" object. IMHO