Thank you John.
Thank you Glen.
Your encouragement is greatly appreciated

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OK I had another go because it is overcast and I need to run the genny and charge the batteries

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So to make the data go further I first stacked everything (LRBG) to make my luminance (mainly because I was not able to calibrate due to the camera change mid stream

and to see how things went with this approach) and then added my luminance to each other channel...so red was all my subs from the L filter and all the subs from the red filter..and same approach for blue and green
So My L stack came out as 10 hours and 16 minutes, red was 5 hours 30 minutes, blue 6 hours 46 minutes and green 5 hours 8 minutes for a total of 27 hours 40 minutes

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Processed in Startools (no HDR) and as good as I could tell for colour.
A small adjustment in Photoshop (minimal) but mainly I go there to resize (no dodge and burn for this one..maybe minimal

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AND so I present my redo for your comments .. are the stars green? EDIT. Second conventional stack and inappropriate flats and darks time 8 hours 16 minutes
alex