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.
Tried this with Campari in place of the amaro santoni. Very pleasant. Surprised at the dominance of fruit notes. Glad I splurged on a nice Palo Cortado bottle! Will make again.