Following up on my previous comment, I just remade this with a new style gin (Gray Whale in this case). This also works very well as anticipated, although I do prefer the original with tequila.
This is so good. The interplay of Suze and elderflower is absolutely fantastic. Add to that the refreshing lemon and a bit of herbal complexity from the tequila. Delicious. It would probably work well with a softer, modern-style gin too. As it is, the perfect drink to sit on the back deck on a late April Sunday.
Tried your specs (except still with Tequila) and Simon's specs and I marginally preferred yours, but I think I would split the difference and up the Elderflower to 25ml.
Either way, this is the first St Germain cocktail I've had where the elderflower hasn't completely overpowered everything else.
My first cocktail using Suze and it was not a disappointment. The Suze and elderflower work unexpectedly well with the tequila to deliver a mild yet interestingly bittersweet flavour. Not sure the name does this cocktail justice.
A bit mild for my tastes (though I substituted Gran Classico for the Suze). But I had a blast adding a white camellia flower to the lemon for the garnish.