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Wonderful Paul .. this is a great project and great image.
Usually in my comments I say only "very nice or beautiful image and so" because i don't speak well your Language but a bit of experience in astrophotography I think to have. For this I make an exception to my rule and I say what I think on the FSQ and bloated stars.
FSQ need a very accurate focus, someone use autofocus routine but this mean a problems for the short CFZ and huge backlash of original focuser. Manual focus is the best way (or changing focuser). Second the temperature ... 1/2 °C and you need absolutely to refocus. Third avoid a single long exposure. At F3.6 multiply this consideration to infinite. This is my experience with this scope and the 8300 sensor. With a large pixel all become really more more easy and possible, squaring CCD apart ...
My opinion ... and my experience !
All the best,
Leo
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