Had to make my own version of this using Pear Liqueur and 1/12 Ancho Reyes Liqueur.
Swapped the Celery for Bobs Coriander bitters.
Definitely on a return a very drinkable Gin Sour.
Benefited from just the dash of absinthe - hardly worth the extra glass for the discard but I NEVER throw out absinthe.