Revisited this recipe. A particularly good variation is to increase the cognac (Remy 1738) to 1.5 oz for somewhat drier 3:2:2 proportions and split the curacao between 1/2 oz P. Ferrand Dry (orange) Curacao and 1/2 oz P. Ferrand Limited Edition Late Harvest Moroccan Yuzu Curacao. The orange bitters were replaced by a dash of Bitter Truth Lemon Bitters. No yuzu zest so garnished with an orange twist. The Moroccan yuzu curacao and lemon bitters increase the complexity while preserving the citrus focus of the original and take this to a new level.