I've been messing with Luxardo Del Santo cut with about 10-15% Vegetal de la Grande-Chartreuse. It works in some drinks. In this, with Clonakilty and Cocchi Storico, it's exposed as a Chartreuse fraud. I do like the result, but you can tell it's missing the sweetness and strident nature of real Chartreuse. Ends up being rather dry, but still stealthily dynamic.