Tony,
Polar alignment was successful which is good, I guess there is a little drift with the outer edges showing star elongation but hey this is something most of us are troubled with. The glob itself is good and you achieved what you setout to do. If your camera can be hooked up to a screen there are programs like sharpcap where you can see a live view instead of using the viewfinder. You could then get a hold of a batinov mask and use it to fine tune your focusing.
I’m not sure about the 300 but the shopping list is always a mile long in this game. Maximise what you have and keep having fun.
Well done.
Anth
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