Our Ministry of Defence archives are the only other likely source, but, as far as I know, it's not easy to do any search in there (lot of chaos and unfriendly bureaucracy!)
I've never talked to the Finnish Ministry of Defense...
AH 190A8 needs some love?
It was heavier, due to larger fuel tank and more armour.That said, I suspect a AoA problem since even with less fuel than a5 ( down to same weight) a8 behave like a pig compared.
The next subvariant, the "FW-190A-8", turned out to be the most heavily produced of all FW-190 subvariants, with over 1,300 built. It was essentially an A-7 with the option for either GM-1 nitrous-oxide engine boost for high-altitude operation, or an additional internal fuel tank, as well as many detail improvements.