Totally agree - the grey scale ones look great.
I did this one with the Clear filter (as well as the LPS filter that I always run)
Full Size -
https://astrob.in/qdqbdc/0/
I will get a colour one sorted eventually! I will crack out PixInsight. I've been staring at it anxiety ridden about the learning curve!
I did one last night also with my DSLR (Canon 7D MkII - 500mm Sigma lens)
https://astrob.in/ee2027/0/
But I had issues with it too - but I did manage to get the colour differences showing!