ok, most of them then
after some tweaking and running for some time overall performance is more steady meaning less sudden fps drops near the bombers etc, but the stutter is still there, and flying over land is still not an option no matter the level of detail, not to mention dogfighting there.
Some shots, notice the fraps framerates...
Testing the DM I noticed some oddities, for example hammering other aircratf head on causes my plane to magically disappear without a trace (or fireball) while the other plane tends to fly like nothing happened, with no visible damage. Check the Spit vs. 110 collision above. All on high difficulty except engine management.