The plane customization isn't working with quick missions, but working well online. My favorite bomber is the Ju88
, try the full bomb load with 'salvo' drop mode. you will like it
ps. i dont know, how familiar with this bird, the bomb bay door crank is on the starboard side of the cocpit (behind the right arm of the bomber officer). It confuses some player, because the He111 has motor moved bbd, there is enough only one click. Here, you have to push the bbd opener key untill the crank is stopped.