I would like one question,why is not included in this part of the E4 Messer?

[41Sqn_Banks]

Maybe the mineshells are selectable as a belting option. I know, the name of the Bf 109 would not be historically 100% correct in this case.

The don't give so much about the names anyway. Just look at the Spitfire names, the "a" in "Mk. Ia" was added to all machine gun armed "Mk. I" when the canon armed "Mk. Ib" came in service. So having a "Mk. I" and a "Mk. Ia" doesn't make much sense as they are the same subversion.