Mirko that's not fair and too easy and I'm very jealous!

I wish mine had that

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Thank you so much for those photos, especially if you made big effort today to do them especially to show me, it's much appreciated.
Joe, I really like your suggestion and you've explained the step by step process extremely well. You would make a great teacher

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Thank you so much, I'm very grateful for the time it took for you to type all that. This sounds like the answer & worth having a go at.
Andrew, many thanks for the link. Nice & cheap at only around $12. But I think it looks too big for my little 4" with my ep & RDF already on the front of the tube. This looks like it's more for a refractor by the looks ? .
Andrew J, I appreciate your tips as well, thank you

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Kev, it sure is. And time consuming grrr.
Rob P, That's what I do now. I can get the shadow really skinny but then I struggle to move the scope in alti. to get the shadow right there too.