We would definitely only require the bump for T/O performance, be it FLL or Obstacle limited. The added CRZ ALT capability would be something I'm interested in. I do not believe 26K compared to 27K will really make a significant difference. The difference I am trying to work out is basically, will we save more engine life with an occasional bump required T/O at 27K and still be able to assume temp reduce to 22K 50 degrees circa. Or is there significant savings in having a 27K fully rated engine which will take us higher (short haul operator bare in mind) but only be able to reduce to 24K @ 50 degrees? Thereby loosing a little EGT margin type saving.. .I know I have access to our Boeing field rep, but am doing a little on the job homework in the mean time.. .Your reply is appreciated. Do you really want to work in Blighty? HAWAII !!! Come on