So glad you all liked the end result
Nice outcome in the end really as I was toying with the idea of doing a similar marathon effort to capture the LRGB data myself, problem being to do the 26hrs of narrow band data any justice I was looking at a few trips out to my scope again..

...

and while I would probably have done it

I was quite releaved really when Josch offered to comnbine our current efforts

and now my image has the LRGB added aaaand it was taken through a Killer of a Philip Keller designed 20" to boot
Yes Peter, aperture certainly wins in the end and your calculations are only for the Ha Josch collected, or about half the final exposure time so I would have spent a lot on petrol trying to match all that with the 6" and no observatory
Thanks again all
Mike