Rik de Boer

An unusual combo of flavours that I like. I'd go one notch lower on the Campari.

Lovely! As mentioned in the text, there's a lovely hint of plum in this well-balanced drink. 5 ingredients, but widely available -- easy to make.

Didn't have hazelnut liqueur. So used walnut liqueur (Nocello) instead.
Floated a couple of raw walnuts on top.
Worked!

Whether you use hazelnut liqueur (which I'm still to try) or walnut liqueur, and echoing @Kenneth below, I'd say this is a subtle and sophisticated lowish-in-alcohol cocktail that will appeal to many, as it mellows out some of the "hard-core" sherry flavours that not everyone likes in sherry by itself.

Like this! Instead of Cocchi Americano Rosa, I made it with Dolin Rouge (as that's the most similar I had).
Upped the fino by 1/2.
Nice touch with the rose water.
Congrats on your prize.