Hello @pennsif. First of all thank you so much for your comment. You're absolutely right, there was an error in the way I marked the map, which led to the incorrect result. I really appreciate you pointing that out, as it gave me the chance to fix it. I’ve made the adjustments now and I believe it should be correct.

If you have any other suggestions or notice anything elseplease let me know.I’m still learning the ropes and feedback from experienced users like you is invaluable.

Thanks again for your help 😊