E7 its called E7 because droptank. If not drop tank is able to carry (that mean no rak), was called E/3-4. Bombs in E-4 and before were an retroffited planes.
Stalkervision, where didi you read that those drop tanks and it's alarming tendency to catch fire in flight btw?
saludos
I believe it was in the Ballentine Series of military books / ME-109 by Martin Caidin buddy.
Pss..that was because they were actually made from pressed and molded paper!
right after the battle a metal one came out but by then it was to late..