I don't know Boadas's recipe for their signature cocktail, and to be honest I'm too polite to ask. And if they told me, I don't think I'd share it as it...
I think this is too sweet - I'm not sure how the taste guide (above) skews to dry, but it was too much for me to enjoy. I used a 12 yo El Dorado and Byrrh - that may have been part of the issue.