DEVO-MAX / FULL FISCAL AUTONOMY ( Part 1 )
What it is: Scotland stays in UK, keeps the pound properly. Bank of England stays your central bank, lender of last resort, sets interest rates, prints notes. Scotland raises most of its own tax and runs most domestic spending. Defence and foreign affairs stay at Westminster.
Currency: No change. No risk. You keep sterling as a full member of the monetary union. No exchange rate with England, which is still Scotland's biggest market by over 60%.
Trade off: You don't control interest rates. Rates are set for London and South East, not Scotland. And if GERS shows a big deficit, devo-max with no Barnett means tax rises or cuts - you can't print money.