Well said SH, though I suspect a fleet of brand new Ks would probably require more maintaining than a fleet of something exceedingly new, shiny and designed for ease of/low maintenance in a modern styleee. Witness the difference in serviceability between, say, the Hawk T1/T1a/T1w fleet at valley (i.e. slim to none) vice the serviceability of the more modern hawk fleets across the world (pretty much the same basic design for the 100 series) and the serviceability is significantly better, but not at the same level that a truly modern aircraft could achieve imho, even on a (relatively) simple airframe.