Hi Ron, glad to see someone is still active. I have not been active or interested enough in months to get the telescope out. You are wondering why the comet is elongated in the shot on this post and it is because the comet is moving at a different speed that the apparent motion of the stars. Try stacking your images "on the comet" instead of "on the stars". The stars will trail a little but the comet will be more round. There are three stacking options in DSS, stars, comet, stars+comet. Keep up the good work.