Empty Cruise, great post!
One little comment: there seems to be a common misconception about the increase in fuel burn with the gear down.
Is 50% really enough?
If you check the QRH and compare the
Reference Fuel and Time Required at Check Point both for the
All Engines and
Gear Down cases, you'll notice you'll need amost twice fuel!
Example: 200 miles, at 20000ft: 1100 kg in 37 minutes, versus 1900 kg in 43 minutes with the gear down.
Be careful!
LEM