Thanks Merlin and JP for your comments, i appreciate the comments you have both made.
JP, see a detailed reply to Startrek's comment re: the gain 100 situation on the picture i did just recently with the comet C/2020 M3.
but basically, i started with 100 and keep getting decent results so haven't changed.
My intention is to try gain 0 next session i get and see if there is noticeable improvement.
thanks
Jack
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