Heres another PN a small green dot on the screen. This one is only 5 x 45 sec at iso 400. any longer will make it over-exposure without any surface details.
You can see the hubble comparison.
racking up quite a number of planetarys eric, i think that a longer focal length is needed to capture any detail. you put up one a while ago it could have been m27 it made image of the week and was a beauty. all these small ones......each to his own