Achow101, thank you for your kind instructions.
Given that I have recovered an unsent raw transaction and posted a redacted version of the output above, is there anything obviously wrong with it? I have verified that the number 'MyLedgerAddress' is the correct public key for my Ledger wallet. I won't hold you responsible if I lose my bitcoins, but would be grateful if you could tell me if there is anything obviously wrong with it or if there is any advantage to trying to make a raw transaction from scratch, in the way that you describe?