Just an update if anyone is interested.

Tried my damndest to use Electrum on my laptop and Android tablet to use the air-gapped signing method and Electrum would absolutely not recognize my transactions properly and never presented me with a "Sign" button on the Android app when scanning the finalized, unsigned transaction from my laptop.  Will never use this POS wallet again.

Used Mycelium on my new tablet, swept my wallets and sent them.  It handled my big daddy (35 inputs, ~3500 vB in size, $7-figure+ balance) like a champ, close to US$800 in Tx fees for quick confirmation.

My BTC is now all snug as a bug in a rug on my BIP39 seed (Billfodl backed-up) now, love my new Ledger Nano X. 

Mycelium comes through just like it always did.

All the best and thanks for being here everyone.