LOL. You know you can check your trash folder for e-mail, right? I sent you a message about substitutions - specifically Cointreau or Kirschwasser.

OK, back in the saddle. I remember when I read your initial message and saw Cointreau, I thought, well of course! And then I thought about Kirschwasser, and what a wonderfully different direction that would take. So yes, absolutely, try either one. I'd especially love to know how the latter works. It's all a science experiment, you know! Thanks for rescuing my conscience!

In this case, wouldn't your first choice be to substitute Cognac or some other brandy-type choice rather than the clearer spirits like Cointreau or Kirsch?

My first choice, given that I'm someone other than myself, making this for the first time, would be to (a) duplicate it exactly and evaluate the results, or (b) if I have everything but GM on hand, but have another brand or liqueur or spirits, fall back, punt using the something else. and again evaluate the results. Will it be the same as the original? No. Will the maker like the results? Well, that depends on him/her. I would much rather that someone dive in and try something rather than hesitate for not being able to duplicate the original. I seriously believe that it's all a science experiment. Does this help you?