Read the f$&king manual is my guess. Haven't googled it.What is RTFM?............................DizzyIzzy
I was also curious about the "double down" kits and I did google that, the f-pac sounds like it is intended to give a "bourbon barrel aged" flavor to the wine. So hopefully that mellows out over time, but to me that would be where all the "hot-ness" comes from, bourbon flavored f-pac.
Pretty sure OP already indicated he was mistaken about the OG, no rocket fuel at all (not 20%), just an f-pac which is imitating a bourbon barrel.