I last flew a Meteor in 1969, but had continuously driven them since AFS in 1951. As I often checked guys out on the beast, in later years I would point out my personal max speed of 400kts, not the 520kts described in Pilot's Notes. My limit was because of the frightening creaks and groans the beast could make when doing anything out of the ordinary e.g. in that quiet moment at the top of a stall turn with the throttles closed and the aircraft yawing. And there seemed to be no requirement to go particularly fast! (I seem to remember that 455 was the Vampire limit). .