Pedota, That story about re-planning in the air is true. Today it is now standard procedure, up here we call it 'Re-dispatch', we often leave the west coast of Obama Land without the 'normal' fuel required and re-calculate on route. At home in Aus it was 'variable reserve', up here it's 'contingency fuel' and is re-calculated to make east coast of Asia. At least it keeps us awake trying to work out if we can make it or not. On the other topic about changing to the 737, Ansett flew both the 200 and the 300 at the same time which kept ones brain working, always suprised me the Dept of Changing Names allowed that.