Enjoyed this but curious why this is stirred notwithstanding the creators explanation. I have always worked under the premise that drinks with citrus are shaken. (Mind you, I'm not beholden to this; I have been known to shake a Negroni a la Stanley Tucci and even a Martini, or should I say a "Bradford"!). As I didn't have castor oil and didn't really feel like using mineral oil, I just expressed a good amount of lemon zest oil to create the requisite "oil slick".
Tempis Fugit Spirits Liqueur de Violettes and Maraska Maraschino Liqueur with Beefeater really shine in this one. New favorite "martini" with just enough sour.
I feel the thing with crème de violette is that it sort of has to be allowed to stand out, otherwise you get a cocktail that just tastes soapy, like what violets dream of when they're in the bath. This less sour Aviation does just that. Great stuff, will probably never make a standard one again!