Thanks guys.
Greg I will give it a try this year and let everyone know the results.
Rob, many of my images are multi night these days. Often the objects I choose just are too dim to capture in one night. Yes the dust is tough but not impossible.
Chris, I am thinking of going back and upping the percentage on data reject to eliminate these pesky trails.
Thanks Mike and Fred. Yes I am trying for less smoothing these days to give a better view, but I think a few more subs in each filter set would not hurt. It is early in the night so I could do this and pick up another object later. If I get a significant improvment I will post the improved image.