I tried the Kappler OG (shaken) and a slightly adjusted version of the recipe here where I only did 1/4oz of Yellow Chartreuse (stirred). The OG was even sweeter than I expected it to be, but the more modern version was nice. I skipped the Meehan version, as I figured it seems as if it would be a bit unbalanced. Maybe I'll try it at some point to confirm.

This ran just a little on the tart side for me. I think a little more Luxardo and/or absinthe, or perhaps some simple, though no more than a bar spoon, would tweak this into balance for me.

I went with a half ounce of brandy (a local pear brandy that is not heavy on the pear) and orange bitters. I like that the brandy brings a little nuance and pairs with the Benedictine well. I am usually wary of a bourbon cocktail, especially when I am using a shelf bourbon, as it can tend to get lost, but it provides a nice, lightly smoky sweet base here.

More balanced than expected, but I do think you have to have an appreciation for Fernet to really enjoy it (although why would you have any to use if you didn't have some appreciation).

I also wonder if an adjustment - using a quarter ounce of it paired with an extra dash of bitters would work, maybe allowing for 3/4oz of the currently limited Green Chartreuse.