Didn't have any lemonade on hand so added +1cl syrup and 1.5cl lemon juice w/ soda water instead. I haven't tried the original to compare, but it came out quite nice & of course has the added benefit of more fresh ingredients and more control over sweetness/acidity.
A fine way to end a hot afternoon. Not as fiddley as muddling a Caipirinha and the Lillet adds a nice complexity. I’d probably skip the sugar syrup next time, though.