Thanks Humayun
I took quite a few JPG's first, becaue ImagesPlus Focus Control wants JPG rather than RAW images to play with - and I forgot to swap back.
All in all, there are about 6 JPG's ranging from 240 to 600 seconds plus a couple of RAWs at around 360 secs.
After talking with Mike, I was going to go with 15 x 15 sec subs followed by 10 x 60, 10 x 240 and 5 x 360 sec shots. The clouds killed that off!
