Thanks for all the comments, folks, I appreciate them.
I managed to find 3 frames that I could stack which has slightly improved the image quality and allowed me to boost the colour saturation and up sample by x2.
For info, this was with the Celestron C9.25 F10 Edge HD at the prime focus using a Canon EOS R5 Mk II.
ISO 3200 at 1/2000 sec.
I have also inserted a screen shot of the Histogram from Lightroom.
Dennis.