Thank you very much Dunk. Several things are conspiring to prevent me
from improving much. I have little empathy with computers. I can't get my head around layers and masks etc: I don't even have, and can't use, a mobile phone. Learnt to copy and paste six months ago.
Still can't get consistent tracking. The night chuckywiz came down we
managed to get 60 secs, which is poor, but useable. The next night I got
150 secs WOW. The next night I got 8 secs.
.
The weather allows so few opportunities to try to fix my problems, let alone actually get some images. I've got two half decent images in the last three months.
raymo