Hi Rob,
just to let you know I had the same as in pic 3 of your starting post.
No wind etc....I did notice a bit of play in the dec bearing and tighted the grub screws a little and now havnt seen those strange shapes anymore ( not that I have done much imaging lately).
i'm also yet to start auto guiding but need to sort out the communication between my software and cam ( PHD and Gstar - via a usb to rca cable -)
Bartman
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