A big jump forward Bert.
Looking pretty good. You've got either some tilt or some flex where the left side is at a different plane to the right in the image (not sure if that means the reverse on your actual scope -I think so - right?).
I went through exactly the same thing with my TEC110 as the focuser was having trouble with the heavy Proline.
Its a trial and error thing. If you have that adjusting plate you should be able to nail it after an hour or so.
Something is happening with the processing where you are black clipping the data so the dim areas are being clipped and instead of being smooth like the first they go splotchy.
What software are you using to enhance the image?
I use CCDstack and also the plugin aligning software that does an incredible job.
Greg.
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