pretty much limited max dive speed to 460 mph
Just keep in mind that what a pilot manual and/or manufacturers suggested safety limits may be...that does not always jibe with the absolute mach limit of the airframes structure. 460 TAS mph is a good yardstick perhaps because the roll rate is uncontrollable at that speed and its elevetors will be stiff as well. It's telling operational pilots to beware of exceeding that but the airframe will still take it past that speed.
I've read comments by Japanese pilots who did take their Zeros past their rated limits. Always hard to decide where to set things like that in a game.
As I said, handles like a pig.
If you are going this fast in a Zeke you are doing it wrong....