@ Concorde Rules.
They are not my figures, they are Boeing Data.
RR would like to go to the twin spool design for their big fan engines as they have done for their smaller engines. The triple spool design has given RR a lot of headaches in the past.
Are you saying that all of the IATA data and airframe manufacturer's data that has been previously noted in past threads is wrong and that your 'calculations' are correct?