I think for a stronger, slightly more modern version I recommend going for 5 cl Whiskey keeping the other ingredients at 7.5 ml each. A nice twist is also to add just a dash of a peated scotch.
In the pursuit of moderate sobriety, I’ve halved the measure of each ingredient from the original and switched the glass from a Martini to a Nick & Nora. We’ll update the image accordingly ASAP.
I found this interesting sounding drink in your list of amaretto cocktails. Made it with Mandarine Napoleon in lieu of Grand Marnier, and it was wonderful; a sweet, tangy combo, redolent with bourbon’s vanilla and the obvious almond and orange notes. Almost dangerously smooth and delicious. A keeper.