Lovely complexity here. But we had to do some work-arounds: the only sherry we had was a bold aged dry flor so we reduced that to 15ml; and lacking the Amaro Santoni we substituted 7.5ml Amaro Nonino Quintessentia and 2.5ml Campari; and we increased the orange bitters to three dashes. If this is anywhere near ballpark what the creator intended, well, we say bravo.