OK, got Bitcoin Cash Node synced.

So I think my next steps are...

1. Buy BCH and eCash dust from you.
2. This gets sent to... my original addresses? An unused address in my existing wallet?
3. Sync Bitcoin Cash Node once dust has verified on blockchain. Take offline.
4. dumpwallet in my original offline BTC wallet
5. importwallet this file into new offline Bitcoin Cash Node.
6. Let it verify, hope all BCH shows up as available back to 2010.
7. Send to Ledger BCH wallet by creating transaction on Bitcoin Cash Node with my 3 UTXOs plus a dust address.
8. Broadcast this transaction using https://blockchair.com/broadcast

All being well, repeat this process with https://www.bitcoinabc.org/ for eCash.