It takes a single malt to properly live up to the big flavours of the whisky liqueur. The only question is how much lemon juice and additional sugar suit...
Smtms I used the Jack Daniels Honey instead of Drambuie, that was so hard to get in my country, and some peychaud for the bitters. I was wright, In this case really I cant see the difference with a normal sour. Nice to know, I would expect a more interesting one.