How many times do we have to learn the lessons of prevous procurement cock ups. There is a reason why commercial operators buu new kit. It is more serviceable, cheaper and more efficient to operate. It's one thing to be dewy eyed at the end of an era as another aircraft is withdrawn from service, however, why can not the military accept that updating and upgrading old kit does not work? Buying new kit is the answer but not on stupid PFI contracts.