Maybe our K4's will have a little more poop if SOW continues on threw the war years
http://www.servinghistory.com/topics..._109K_Kurf_Rst
I've seen this top speed listed in books too and this pilot on "Dogfights"...although who can trust that...says he had a heck of a time with one and you can see it's a K4 buy the covers on the retracts.
I'll have to try his snazzy maneuver some day.