Turns out it’s just 3 bits of extra randomness, so only 8 combinations to try. 

Are you working on a 12 or 24 word seed? https://image.nostr.build/f0802feffe351c3e3252173496542f3695959a9241c1868d0b7480bade917273.jpg https://image.nostr.build/ae9748e8a6cfdc1ff2ad35024870a905bf22c550e915cc02e24095a2b1827b8f.jpg https://image.nostr.build/c09c7a074334fc0308efad2129e15cba98e6cf0c3aba9aa049576d1dc1cda5be.jpg https://image.nostr.build/a393d7230a91cb82c38eb4fcad440fe31cc99e58af296038ed677e10b4369dff.jpg