Black 6 Thu 19th Apr update re Spit II

[Talisman]

http://www.spitfireperformance.com/spitfire-II.html

I pressume the new Spit II speeds that that Black 6 mentioned in the Apr 19th update will be in accordance with the speed tests contained in the attached link.

If I read the data correctly, the Spit II should make 294 mph ASI at 1,000 ft and approx 319 mph (+25 mph) when emergency power boost cut-out is operated; or have I got it all wrong?

As I understand it, the emergency power boost cut-out gave approx 25 to 30 mph extra if operated below the full throttle height of 12,800 ft.

Thoughts?

Talisman