So tonight I went out before the star party to try and see if changing the distance between the sensor chip and the corrector would make a difference in the star shapes. It didn't appear to.
And on top of that, I was having strange drift issues even though my guide graph looked pretty good. All the stars are oblong. Waaaaa... I hope I can get things dialed in quickly on the first night of the star party tomorrow otherwise all of my images will have sloppy stars. I guess even if they do I'll still get better images then I would here at my house.
Here is the image I took after dinking around. 45 minutes of M27.
Dumbbell Nebula (M27) Image
I've shot the Dumbbell several times in the past, but the last time was 2 years ago. My equipment and experience have both improved since then and this shot is pretty decent.
Scope: Vixen R200SS 200mm @ f/4 w/Vixen R200SS Coma Corrector
Mount: Orion Sirius EQ-G with GoTo
Guiding: Meade DSI Pro and PHD Guiding
Guide Scope: William Optics ZenithStar 66 SD
Camera: Canon EOS 20D (unmodified)
Special Settings: None
Exposure: 45 minutes - (9 x 300s)
Processing Software: Acquired in Nebulosity, Stacked in Deep Sky Stacker, Levels and Curves in Photoshop
See Gallery below for image