Thanks Guys,
It was just good to be out there again.
Here is a cropped version of the 10 x 5 minutes Ha stack = 50 minutes.
It's been heavily stretched & also sharpened at 2 pixels.
I would have been better off with 2 x 25 minute frames in the same time
but I was shooting between clouds.
It did help with getting some detail out of the core in the first image.
The trapezium came up nicely as the Ha stars are always small.
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