Thanks for your comments Alex, Michael, Darrell, Paul, Roger, Trevor and Lester NGC300 is fairly large but a bit on the faint side. I still have a few gremlins in the mount causing egg shaped stars resulting in throwing away half the data. I should have also taken some calibration frames as my secondary mirror is under sized although as Roger said it seems to be brighter around the edges the opposite of vignetting.
clear skies Ken