Bert no dithering between exposures. Perhaps I ought investigate this, but knowing the EM400 and Tak this will be another thing I cannot do with the mount due to electronic hand controller short comings.
I was a bit under sampled though as I was 2x2 binned for this image. Perhaps I should have been at 1x 1 and that would have given me a better resolution. Completely forgot all about that.
Thanks for the link Rolf.