Hard to hear me with my foot in my mouth, but, CONGRATS! ;-)
Not at all :-). Thank you for your original comment. Clearly the sky wasn't "strong" enough to show what I wanted it to show. I thought your comment was most useful, honestly.
I did think it should have been darker actually, but that was the best I could get it to without loosing other stuff. Not sure if there are stronger polarising filters? When I bought mine they just gave me the one I now have. Never asked a question, so I assumed that is what there is. Will check that out.