Really nice capture Martin. I did this one about a month ago but with a narrower field of view so I missed the big bright star. Very little difference on M30 between ours
I personally wasn't sure about all of the blue considering it's an old globular cluster but it is nice to see yours having the same colour
EDIT:
One point I'd like to make with posting an image in this thread is that I can say that mine was taken under similar conditions; kinda moonless suburban skies with a OSC, my skies are bright enough that the moon barely makes any difference
with the same overall exposure. One big difference being the overall cost of equipment. Your small 6" F/6 shows largely the same image as my heavy 10" F/10. Point being, you don't need big heavy equipment to take a great shot