I tried it with the Wild Turkey 101 that Simon has listed in his notes. I prefer it in this cocktail to some more expensive bourbons I had tried. Surprising how well the Chartreuse and Aperol work together. Dolin Genepy works fine if you have a limited supply of chartreuse.
The Last Word is one of my favorite cocktails, but I find this to be superior. I stick to the specs and feel it benefits from a good long shake. I have tried it with more expensive Irish whiskeys but find regular Jameson works quite well. Excellent work Mr. Difford.