This seems to prove my point about many people knowing about the factories :-)
Each country has five factories, each unmarked on the map. Not entirely certain from your post, but it seems you're unaware of them?
You can get a map to print showing them at:
http://home14.inet.tele.dk/snefens/islesmap3.gif The "dirty little secret" about them is that they are comprised of many buildings that individually are extremely easy to blow up with small bombs, a couple rockets, or a little bit of strafing.
Hence, it's possible to get up to 40 FIGHTER perk points in a couple sorties in a heavy fighter attacking them.
I racked up about 100 perks in an hour a couple days ago. The factories often end up "Behind enemy lines" (surrounded by the fields of a different country) making them dead meat.
[This message has been edited by Torgo (edited 02-12-2001).]