Aha! Now I'm getting somewhere!
Usually I have to conserve my certs by foregoing the upgrade if a bulkhead aisle becomes available. That gristle served in plastic tastes a little better when I catch the scent of sizzling steak wafting through the curtain...
Since my business travel is only domestic, I guess I'll have to make some mileage runs this year to finally get up to 1K.